Filtre
  • Producator
  • Aplicabilitate
  • Tip
  • Format
  • Tip scaner
  • Display
  • Tehnologie Scanare
  • Sistem operare
  • Tip transfer date
  • Rezolutie
  • Sistem Operare
  • Conectivitate
  • Conectivitate
  • Camera
  • Dimensiune ecran
  • Standard protectie
  • Tip ecran
  • Memorie
  • Memorie RAM
  • Baterie
  • Standard de protectie
  • Frecventa procesor
  • Capacitate de stocare
  • Culoare
  • Tastatura fizica
Promotii
(P/N: NVT16000M)
capacitate 16 kg, precizie 5 g, platan 230x174mm, display LCD, verificare metrologica
974,87 lei
1.218,62 lei
(t.v.a. inclus)

Terminale mobile

Terminale mobile

Terminalele mobile portabile sunt echipamente recomandate lucratorilor de teren pentru ca sunt rezistente la socuri mecanice, la praf, la temperaturi extreme si la stropirea cu apa, fiind potrivite pentru conditii de lucru grele.

Terminalele mobile sunt device-uri robuste, cu greutate redusa, ce indeplinesc si functia unui cititor de coduri de bare, fiind dedicate culegerii si procesarii de date, destinate segmentului Enterprise si reprezentand solutia ideala pentru aplicatii de retail. Terminalul mobil portabil este recomandat si in depozite, putand fi folosit ca un interogator pentru stocuri.

Pe langa scanerul imager 1D / 2D, terminalele mobile mai au integrate si camera foto, GPS, sistem de operare Android sau Windows pentru a oferi conectivitate si schimb de informatii oriunde si oricand, indiferent daca lucratorii se afla la birou sau pe teren.

In magazinul nostru online gasiti oferte pentru terminale mobile portabile de la principalii producatori internationali precum Zebra, Honeywell, Datalogic, Unitech.

Vizualizare: Lista / Grid
Produse / pagina:
Sortare dupa:
(P/N: TC25BJ-10C102A6)
imager 2D (SE4710), USB, Bluetooth, Wi-Fi, 4G, PTT, Android Nougat 7.X, camera 8 MP, IP65, acumulator 3000 mAh, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash
Top vanzari
4
4
2.492,14 lei
(t.v.a. inclus)
(P/N: K-MC2180-AS12E-CD2)
scaner imager 2D, Bluetooth, WLAN 802.11, 21 taste, 256MB RAM, Windows CE 6.0 PRO, display color touchscreen, single slot cradle, cablu USB, sursa alimentare, stylus, snur pentru stylus, protectie ecran, curea de mana
Top vanzari
4.584,01 lei
(t.v.a. inclus)
(P/N: TC200J-1KC111A6)
imager 2D (SE4710), USB, Bluetooth, Wi-Fi, PTT, Android Nougat 7.X, camera 8 MP, IP54, acumulator 3000 mAh, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash, tastatura numerica
Top vanzari
4
4
2.346,00 lei
(t.v.a. inclus)
(P/N: TC200J-10A111A6)
imager 2D (SE2100), USB, Bluetooth, Wi-Fi, PTT, Android Nougat 7.X, IP54, acumulator 3000 mAh, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash
Top vanzari
1.876,85 lei
(t.v.a. inclus)
(P/N: TC200J-10C112A6)
imager 2D (SE4710), USB, Bluetooth, Wi-Fi, PTT, Android Nougat 7.X, camera 8 MP, IP54, acumulator 3000 mAh, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash
Top vanzari
3
3
2.112,18 lei
2.297,08 lei
(t.v.a. inclus)
(P/N: 944250022)
Brick, Straight Shooter, imager 2D, green spot with ilumination, Wireless Lan, Bluetooth, Audio, 256 MB RAM/512 MB Flash, 25 de taste, baterie 1430mAh, Windows CE 6.0, cradle, power supply, USB cable
Top vanzari
2.028,03 lei
(t.v.a. inclus)
(P/N: KT-TC25BJ-10B101EU)
imager 2D (SE2100), USB, Bluetooth, Wi-Fi, 4G, PTT, Android Nougat 7.X, camera 8 MP, IP65, acumulator 3000 mAh, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash, cablu USB inclus, alimentator inclus
Top vanzari
2.290,06 lei
(t.v.a. inclus)
(P/N: MC32N0-GI3HCLE0A)
gun, imager, 2D, Wi-Fi, Bluetooth, 38 taste alfanumerice, baterie extinsa 4800mAh, 512MB RAM, 2GB Flash, Win Embedded Compact 7, IPa54
Top vanzari
4.909,87 lei
(t.v.a. inclus)
(P/N: MC32N0-SI4HCHEIA)
standard, imager, 2D, Wi-Fi, Bluetooth, 48 taste alfanumerice, baterie extinsa 4800mAh, 1GB RAM, 4GB Flash, Win Embbeded Compact 7, IP54, Interactive Sensor
Top vanzari
5.215,43 lei
(t.v.a. inclus)
(P/N: EA602-QALFUMSG)
brick, imager, 2D, USB, Bluetooth, Wi-Fi, GPS, NFC, RFID, 4G, IP65, 4000 mAh, Android 7.1, Qualcomm 8937, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash
3.551,33 lei
(t.v.a. inclus)
(P/N: K-MC2180-MS01E-CRD)
scaner laser 1D, Bluetooth, WLAN 802.11, 21 taste, 128MB RAM, Windows CE 6.0, display color touchscreen, single slot cradle, cablu USB, sursa alimentare, stylus, snur pentru stylus, protectie ecran, curea de mana
4
4
3.667,98 lei
(t.v.a. inclus)
(P/N: MC32N0-RL3SCLE0A)
rotating head, laser, 1D, Wi-Fi, Bluetooth, 38 taste alfanumerice, baterie 2740mAh, 512MB RAM, 2GB Flash, Win Embedded Compact 7, IP54
4.208,46 lei
(t.v.a. inclus)
(P/N: MC32N0-SL4HCLE0A)
standard, laser, 1D, Wi-Fi, Bluetooth, 48 taste alfanumerice, baterie extinsa 4800mAh, 512MB RAM, 2GB Flash, Win Embedded Compact 7, IP54
4.528,82 lei
(t.v.a. inclus)
(P/N: MC330M-GI3HG2RW)
gun, imager, 2D, USB, Bluetooth, Wi-Fi, slot card, 38 taste, baterie extinsa 5200 mAh, push-to-talk, Android 7.1 Nougat AOSP, GMS, IP54, 1.8 GHz hexa core processor, 2 GB RAM / 16 GB Flash
5.228,48 lei
(t.v.a. inclus)
(P/N: CT40-L0N-1NC110E)
brick, imager N6600, standard range, 2D, Bluetooth, Wi-Fi (802.11ac), NFC, 4090 mAh, Android 7.1, GPS, GMS, ESD, IP64, Qualcomm Snapdragon 660, 2.2 GHz, 2 GB RAM / 32 GB Flash
5.257,10 lei
(t.v.a. inclus)
(P/N: 6510GPB1233E0H)
imager 2D, Bluetooth, Wi-Fi, 28 taste, acumulator 3300mAh, Win CE 6.0, IP54, alimentator
5.432,07 lei
(t.v.a. inclus)
(P/N: TC200J-10A111A6-RF)
imager 2D (SE2100), USB, Bluetooth, Wi-Fi, PTT, Android Nougat 7.X, IP54, acumulator 3000 mAh, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash
1.449,13 lei
(t.v.a. inclus)
(P/N: EA500-WHLFUMDG)
brick, imager Premium, 2D, USB, POGO Pin, Bluetooth, Wi-Fi, Android 8, GPS, NFC, 4G, IP65, acumulator 3800 mAh, Qualcomm 8940, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash
2.353,14 lei
(t.v.a. inclus)
(P/N: WD100-0AWRUMSG)
wearable, 4 inch, touchscreen, Bluetooth, Wi-Fi (802.11a/b/g/n), 2950 mAh, Android 7.1, GPS, 4G, IP65, Qualcomm, 1.2 GHz, 2 GB RAM / 8 GB Flash, alimentator inclus, suport de mana inclus
3.447,28 lei
(t.v.a. inclus)
(P/N: EDA51-1-B623SOGOK)
brick, imager, SR, 2D, USB, Bluetooth, NFC, Wi-Fi, 4G (LTE), 4000 mAh, Android 8.1, 4G, GPS, GMS, IP64, Qualcomm 1.8 GHz, 2 GB RAM / 16 GB Flash
3.737,45 lei
(t.v.a. inclus)
(P/N: K-MC2180-MS12E-CD2)
scaner laser 1D, Bluetooth, WLAN 802.11, 21 taste, 256MB RAM, Windows CE 6.0 PRO, display color touchscreen, single slot cradle, cablu USB, sursa alimentare, stylus, snur pentru stylus, protectie ecran, curea de mana
4.005,34 lei
(t.v.a. inclus)
(P/N: MC330M-RL3HA2RW)
rotating head, laser, 1D, USB, Bluetooth, Wi-Fi, slot card, 38 taste, baterie extinsa 5200 mAh, push-to-talk, Android 7.1 Nougat, NON-GMS, IP54, 1.8 GHz hexa core processor, 2 GB RAM / 16 GB Flash
4.349,72 lei
(t.v.a. inclus)
(P/N: MC32N0-GL4HCLE0A)
gun, laser, 1D, Wi-Fi, Bluetooth, 48 taste alfanumerice, baterie extinsa 4800mAh, 512MB RAM, 2GB Flash, Win Embedded Compact 7, IP54
5
5
4.530,21 lei
(t.v.a. inclus)
(P/N: MC32N0-RL2HCLE0A)
rotating head, laser, 1D, Wi-Fi, Bluetooth, 28 taste numerice, baterie extinsa 4800mAh, 512MB RAM, 2GB Flash, Win Embedded Compact 7, IP54
4.530,44 lei
(t.v.a. inclus)
(P/N: MC32N0-RL3HCHEIA)
rotating head, laser, 1D, Wi-Fi, Bluetooth, 38 taste alfanumerice, baterie extinsa 4800mAh, 1GB RAM, 4GB Flash, Win Embedded Compact 7, IP54, Interactive Sensor
4.605,42 lei
(t.v.a. inclus)
(P/N: 942550013)
imager, 1D, USB, serial, Bluetooth, Wi-Fi, 28 taste, baterie 3000 mAh, WEC 7, IP64, TI OMAP 4, 1 GHz, 1 GB RAM / 8 GB Flash
4.649,30 lei
(t.v.a. inclus)
(P/N: TC510K-2PAZU2P-A6)
imager, 2D, push to talk, Bluetooth, Wi-Fi, NFC, acumulator 4300mAh, Android 6.0, IP67, 1.8 GHz hexa core processor, 2 GB RAM / 8 GB Flash
5.327,09 lei
(t.v.a. inclus)
(P/N: CT40-L0N-2SC110E)
brick, imager N6603, standard range, 2D, Bluetooth, Wi-Fi (802.11ac), NFC, 4090 mAh, Android 7.1, GPS, GMS, ESD, IP64, Qualcomm Snapdragon 660, 2.2 GHz, 4 GB RAM / 32 GB Flash
5.568,63 lei
(t.v.a. inclus)
(P/N: TC56DJ-1PAZU2P-A6)
imager, 2D, push to talk, Bluetooth, Wi-Fi, 4G, NFC, acumulator 4300mAh, Android 6, IP67, Google Mobile Services, 1.8 GHz hexa core processor, 2 GB RAM / 16 GB Flash
5.640,47 lei
(t.v.a. inclus)
(P/N: MC67NA-PMABAA003LC)
imager 2D, Bluetooth, Wi-Fi (802.11a/b/g/n), GSM-Voice, 3G (HSPA+), RAM: 512 MB, Flash: 2GB, Win Embedded Handheld, IP64, baterie extinsa
5.833,50 lei
(t.v.a. inclus)
(P/N: TC56DJ-2PAZU4P-A6)
imager, 2D, push to talk, Bluetooth, Wi-Fi, 4G, NFC, acumulator 4300mAh, Android 6, IP67, 1.8 GHz hexa core processor, 4 GB RAM / 32 GB Flash
5.953,75 lei
(t.v.a. inclus)
(P/N: TC56DJ-1PAZU4P-A6)
imager, 2D, push to talk, Bluetooth, Wi-Fi, 4G, NFC, acumulator 4300mAh, Android 6, IP67, Google Mobile Services, 1.8 GHz hexa core processor, 4 GB RAM / 32 GB Flash
5.953,75 lei
(t.v.a. inclus)
(P/N: TC57HO-1PEZU4P-A6)
brick, imager, SE4710, 2D, 5 inch, USB, Bluetooth, Wi-Fi, NFC, 4G, 4100 mAh, Android 8.1, IP67, GPS, GMS, Qualcomm Octa Core, 2.2 GHz, 4 GB RAM / 32 GB Flash
6.552,03 lei
(t.v.a. inclus)
(P/N: MC55E0-PL0S3QQA9WR)
brick, imager, SE4710, 2D, standard range, 3.5 inch, USB, Bluetooth, Wi-Fi, audio, 3600 mAh, Win Embedded Handheld 6.5, IP64, MIL-STD 810G, TI OMAP 4 dual core 800 MHz, 512 MB RAM / 2 GB Flash
6.574,95 lei
(t.v.a. inclus)
(P/N: MC67NA-PDABAA00500)
imager 2D, Bluetooth, Wi-Fi (802.11a/b/g/n), GSM-Voice, 3G (HSPA+), RAM: 1 GB, Flash: 8GB, Win Embedded Handheld, IP67, baterie extinsa
8.914,98 lei
(t.v.a. inclus)
(P/N: CN51AQ1KN00W0000)
imager 2D, Bluetooth, Wi-Fi (802.11a/b/g/n), 43 taste, QWERTY, acumulator 3920mAh, Windows Embedded Handheld 6.5, IP64
8.944,81 lei
(t.v.a. inclus)
(P/N: MC92N0-GA0SYJAA6WR)
gun, laser, 1D, standard range, Bluetooth, Wi-Fi, audio, 53 taste (emulator 5250), baterie 2400 mAh, senzor interactiv, Android Kit Kat, IP64,1 GHz dual core processor, 1 GB RAM / 2 GB Flash
9.692,13 lei
(t.v.a. inclus)
(P/N: MC930B-GSEGG4RW)
gun, imager, SE4850, 2D, long range, USB, Bluetooth, Wi-Fi, 53 taste, emulator 5250 7000 mAh, Android 8.1, IP67, MIL-STD 810G, 2.2 GHz, Qualcomm Snapdragon 660, 4 GB RAM / 32 GB Flash
9.835,36 lei
(t.v.a. inclus)
(P/N: MC67NA-PJABAA00300)
imager 2D, Bluetooth, Wi-Fi (802.11a/b/g/n), GSM-Voice, 4G (HSPA+WAN), GPS, RAM: 512 MB, Flash: 2GB, Win Embedded Handheld, IP64, baterie Li-Ion
10.095,24 lei
(t.v.a. inclus)
(P/N: TC83B0-2005A510RW)
imager, 2D, medium range, Bluetooth, Wi-Fi, acumulator 7000mAh, Android 8.1, IP65, 20.2 GHz Qualcomm OctaCore , 4GB RAM / 32 GB Flash
10.466,95 lei
(t.v.a. inclus)
(P/N: VC8010FSBB31CBAAXX)
10 inch, display rezistiv touchscreen, 1024x768, Windows 10 IoT Enterprise, Intel E3845 Quad Core, 4 GB RAM, 64 GB Flash, USB, serial, Bluetooth, Ethernet, Wi-Fi, IP66, -30C - 50C
18.563,58 lei
(t.v.a. inclus)
(P/N: ES405B-0AE2-RF)
ES405B, bluetooth, 3G, GPS, WLAN 802.11, camera 3.2 MP, coduri 1D si 2D, WM Pro 6.5, baterie extinsa. PRODUS RECONDITIONAT
435,26 lei
(t.v.a. inclus)
(P/N: MC3190-RL3H04E0A-RF)
Brick, Rotating Head, laser 1D, Wireless Lan, Bluetooth, Audio, baterie 4800 mAh, tastatura cu 38 de taste, Windows CE 6.0
1.678,02 lei
(t.v.a. inclus)
(P/N: MC92N0-GM0SXEYA5WR)
gun, imager (SE4750), 2D, medium range, 3.7 inch, Bluetooth, Wi-Fi, audio, 53 taste, 2400 mAh, Windows CE 7.0, IP64, MIL STD 810G, TI OMAP 4 1 GHz, 512 MB RAM / 2 GB Flash
(P/N: MC1000-KU0LA2U000R)
standard, laser, 1D, 21 taste, baterie 1800 mAh/3 baterii AAA, Windows CE, 312 MHz processor, 32 MB RAM / 32 MB ROM, display monocrom non-touch
644,01 lei
715,57 lei
(t.v.a. inclus)
(P/N: MC3000R-LM38S00KER)
Brick, cap rotativ, laser, 1D, batch, tastatura alfanumerica, baterie Li-Polymer 2600 mAh, Windows CE 5.0 Core
870,52 lei
(t.v.a. inclus)
(P/N: ES405B-0AE2)
ES405B, bluetooth, 3G, GPS, WLAN 802.11, camera 3.2 MP, coduri 1D si 2D, Windows Mobile Proffesional 6.5, baterie extinsa
987,17 lei
(t.v.a. inclus)
(P/N: MC5040-PK0DBNEA7WR)
standard, PICO imager, 2D, Wi-Fi, audio, tasta navigare, baterie 1560 mAh, Windows Mobile, Intel XScale 520 Mhz, 64 MB RAM / 64 MB ROM
1.183,91 lei
(t.v.a. inclus)
(P/N: 944250021)
Brick, Straight Shooter, imager 2D, green spot with ilumination, batch, 256 MB RAM/512 MB Flash, 25 de taste, baterie 1430mAh, Windows CE 6.0, cradle, power supply, USB cable
5
5
1.600,14 lei
(t.v.a. inclus)
(P/N: MC3190-RL2S04E0A-RF)
Brick, Rotating Head, laser 1D, Wireless Lan, Bluetooth, Audio, tastatura cu 28 de taste, Windows CE 6.0
1.678,02 lei
(t.v.a. inclus)
(P/N: MC3190-RL2H04E0A-RF)
Brick, Rotating Head, laser 1D, Wireless Lan, Bluetooth, Audio, baterie 4800mAh (upgraded), tastatura cu 28 de taste, Windows CE 6.0
1.678,02 lei
(t.v.a. inclus)
(P/N: SB1B-SE11A0WW)
128 MB RAM, 128 MB Flash, 7.62 cm (3 inch) QVGA (320x240), 802.11b/g/n, Black
5
5
1.919,74 lei
(t.v.a. inclus)
(P/N: TC200J-1KC111A6-RF)
imager 2D (SE4710), USB, Bluetooth, Wi-Fi, PTT, Android Nougat 7.X, camera 8 MP, IP54, acumulator 3000 mAh, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash, tastatura numerica
2.158,90 lei
(t.v.a. inclus)
(P/N: 944250001)
Brick, Straight Shooter, laser 1D, green spot, batch, 256 MB RAM/512 MB Flash, 25 de taste, baterie 1430mAh, Windows CE 6.0, power supply, USB cable
2.161,34 lei
(t.v.a. inclus)
(P/N: EA500-QHLFUMDG)
brick, imager Basic, 2D, USB, POGO Pin, Bluetooth, Wi-Fi, Android 8, GPS, NFC, 4G, IP65, acumulator 3800 mAh, Qualcomm 8940, 1.4 GHz Octa Core, 2 GB RAM / 16 GB Flash
2.187,86 lei
(t.v.a. inclus)
(P/N: 944250011)
Brick, Straight Shooter, imager 2D, green spot, functie batch, 128 MB RAM/512 MB Flash, touch-screen, 25 de taste, baterie 1430mAh, Windows CE 6.0, cradle, alimentator, cablu USB
2.290,87 lei
(t.v.a. inclus)
(P/N: 70E-L00-C111SEW)
imager 1D/2D, procesor 1 GHz, 512MB RAM, Windows Embedded, 4.3 inch display touchscreen, Bluetooth, Wi-Fi
2.398,00 lei
(t.v.a. inclus)
(P/N: EC300K-1SA2AA6)
brick, imager, 2D, SR, 3 inch, USB-C, Bluetooth, Wi-Fi, audio, 1200 mAh, Android 8.1, IP54, Qualcomm Snapdragon 660 2.2 GHz, 4 GB RAM / 32 GB Flash
2.165,63 lei
2.406,24 lei
(t.v.a. inclus)
(P/N: 944250004)
Brick, Straight Shooter, laser 1D, green spot, Wireless Lan, Bluetooth, Audio, 256 MB RAM/512 MB Flash, 25 de taste, baterie 1430mAh, Windows CE 6.0, power supply, USB cable
2.424,18 lei
(t.v.a. inclus)
(P/N: EA502-QAWRUMSG)
brick, imager N6603, 2D, USB, Bluetooth, Wi-Fi, Android 7.1, GPS, NFC, RFID, 4G, IP67, acumulator 3800 mAh, Qualcomm 8917, 1.4 GHz Quad Core, 2 GB RAM / 16 GB Flash
2.435,20 lei
(t.v.a. inclus)
(P/N: TC200J-10C213A6)
imager 2D (SE4710), USB, Bluetooth, Wi-Fi, PTT, RFID Ready, Android Nougat 7.X, camera 8 MP, IP54, acumulator 3000 mAh, 1.4 GHz Octa Core, 2 GB RAM / 32 GB Flash
2.695,14 lei
(t.v.a. inclus)
(P/N: 944250006)
Brick, Straight Shooter, imager 2D, green spot, Wireless LAN, Bluetooth, 256 MB RAM/512 MB Flash, 25 de taste, baterie 1430mAh, Windows CE 6.0, IP54, sursa de alimentare, cablu USB
2.701,12 lei
(t.v.a. inclus)
(P/N: HT630-9000BADG)
2.5MB RAM, DOS, cablu USB, BATCH, Scaner Laser Wide Angle,ecran monocrom
2.725,09 lei
(t.v.a. inclus)
(P/N: EA500-WHLFXMDG)
brick, imager Premium, 2D, USB, POGO Pin, Bluetooth, Wi-Fi, Android 8, GPS, NFC, 4G, IP65, acumulator 3800 mAh, Qualcomm 8940, 1.4 GHz Octa Core, 4 GB RAM / 64 GB Flash
2.789,91 lei
(t.v.a. inclus)
(P/N: 944700024)
brick, imager, 2D, standard range, 4.3 inch, USB, Bluetooth, Wi-Fi, audio, 3000 mAh, Android 8.1, GMS, Qualcomm Quad Core 1.0 GHz, 2 GB RAM / 16 GB Flash
2.793,22 lei
(t.v.a. inclus)
(P/N: 944700023)
gun, imager, 2D, standard range, 4.3 inch, USB, Bluetooth, Wi-Fi, audio, 3000 mAh, Android 8.1, GMS, Qualcomm Quad Core 1.0 GHz, 2 GB RAM / 16 GB Flash
4
4
2.923,92 lei
(t.v.a. inclus)
(P/N: HT630-9000CADG)
4.5MB RAM, DOS, cablu USB, BATCH, Scaner Laser Wide Angle,ecran monocrom
2.929,55 lei
(t.v.a. inclus)
(P/N: 944400000)
Brick, laser, 1D, Bluetooth, Wi-Fi 802.11b/g/n, 27 taste numerice, baterie 1800mAh, Windows Embedded Handheld 6.5, IP54
3.092,16 lei
(t.v.a. inclus)
(P/N: EA300-QAWFUMSG)
brick, imager, 2D, standard range, 4 inch, USB, Bluetooth, Wi-Fi, NFC, 4G, audio, 3800 mAh, Android 5.1, GPS, IP65, Qualcomm 8916, 1.2 GHz Quad-Core, 2 GB RAM / 16 GB Flash
3.195,11 lei
(t.v.a. inclus)
(P/N: 944400006)
Brick, imager, 2D, Bluetooth, Wi-Fi 802.11b/g/n, camera foto 3MP, 46 taste QWERTY, baterie 1800mAh, Windows Embedded Handheld 6.5, IP54
3.223,20 lei
(t.v.a. inclus)
 
Garantia de retur