| | Card Readers:GR-311B |
| Device type | External Card Reader USB 3.0 |
| Interface | USB 3.0, Full compatibility USB 1.0, USB 1.1, USB 2.0 |
| Slots numbers | 2 |
| Maximum transfer speed, MBps | 145 |
| Simultaneous reading of two SD cards | No |
| Simultaneous reading of two microSD cards | No |
| SDXC format support | Yes |
| USB hub ports numbers | |
| Additionally | |
| Plug & Play | Yes |
| Length of the interface cable, mm | |
| Power indicator | |
| Activity indicator | Yes |
| Power | by USB |
| Additional power | |
| Power Cable | |
| Slot 1 | SDXC - Secure Digital™ eXtended Capacity, SDHC - Secure Digital™ High Capacity, SD - Security Digital™, MMC - MultiMediaCard™ |
| Slot 2 | MicroSDXC™, MicroSDHC™, MicroSD™, TransFlash™ |
| Slot 3 | |
| Slot 4 | |
| Slot 5 | |
| Slot 6 | |
| Slot 7 | |
| Slot 8 | |
| Slot 9 | |
| Controller cardreader | GL3220 |
| Controller Hub | |
| Other controllers | |
| Operating system | Windows 10, Vista, Windows 7, Windows 8, Mac OS v10.x. Mac OS X 10.3-10.6, Linux OS |
| Software and Drivers | No |
| Сompatibility | Compatibly with all computers with USB port |
| Housing Material | ABS plastic |
| Color of front panel | |
| Case color | Black |
| Cardreader | 1 |
| Interface Cable | |
| Mounting screws | |
| User Manual / Warranty Card | 1 |
| EAN13: | 4892207100616 |
| Height, mm | 17 |
| Width, mm | 10 |
| Depth, mm | |
| Net weight, gr | 8 |
| Type of packaging | Blister |
| Packing height, mm | |
| Packing width, mm | |
| Packing depth, mm | |
| Package gross weight, gr | |
| Quantity of consumer packages, pcs | 200 |
| ITF14: | |
| Height of the box, cm | 25 |
| Width of the box, cm | 30 |
| Box depth, cm | 46 |
| Box gross weight, kg | |
| Net weight of the box, kg | |