Specification:- Model number: 613- Type: 2.4G wireless slim keyboard- Color: Black/White/Gold- Material: Aluminum + PC- Chipset: Broadcom- Interface: USB 2.0- Working range: 10m-  Size: 284.5mm*119.8mm*6.70mm-  78 keys, including 6 multi-media keys.-  Keyboard and Mouse are both powered by 2 pieces of AAA batteries.-  It has power switch, when no use it, can power off to save power.- Ultra Thin keyboard, main body only 6.7mm.-  Button materials made in ABS+PC, and thickness only 2.5mm.- Good touch feeling you can never imagine  -  Just plug and play, needs no driver.  -  Ergonomic design, comfortable to operate.    -  Decent and fashionable design.OS require:USB portWindows 2000Windows XPWindows Vista, Windows CE, Windows 7, Windows 8Linux (Debian-3.1, Redhat-9.0 Ubuntu-8.10 Fedora-7.0 tested)Android OS (With standard USB interface)Packing including:1xWireless keyboard1xUSB receiver1xUser manual