EH0257B Features Up to 10 m wireless operation of your PC QWERTY keyboard layout Ultra sensitive touchpad with multi-point touch supported USB dongle Plug and play capability， no need to install software Replaceable AAA battery Equipped with indicator lights for signal， data transmission and power Made of silicone， comfortable to the touch General Specs Brand & Model ipazzport KP-810-19 Type Wireless keyboard Material Silicone Operating Range Up to 10 m Connection RF 2.4GHz Transmit Voltage Max. +4dBm Language Russian Working Voltage 3.0V Working Current <70mA Power Supply 2 x AAA batteries System Requirements Windows 2000/XP/Vista/CE/7， Linux (Debian-3.1， Redhat-9.0， Ubuntu-8.10， Fedora-7.0 tested)， Android， MAC Dimensions 158 x 56 x 15 mm Weight 66.5 g Package Details Weight: 172.27 g Size: 22*12.5*4 cm Package Includes ipazzport KP-810-19 Mini Handheld Wireless Keyboard *，