Easy to carry as mobile accessory. Usb powered (no external power or battery needed). Easy plug play installation device easy to transfer data between your digital camera, pc ; your cell phone. Fully compliant withUSB 2. 0 specification ;USB 1. 1 port. System requirements: pc/mac computer withUSB port, windows 2000, xp, vista, 7, mac os 9. 0+. Super mini size, slim- high speed 480 mbps. Highly durable metal shell casing size: 2. 7cm x 1. 8cm x 0. 6cm - 1. 06inch x 0. 71inch x 0. 24inch. package included: 2+1 x tf card reader packaging details unit type: piece package weight: 10gm package size: 20cm x 20cm x 10cm (7. 87inch x 7. 87inch x 3. 94inch) handling and packing: packing done with good amount of care so that you get the item in good condition. It is your responsibility to ensure that the packet received is in non-tampered condition.