EH0310B Features 2.4GHz wireless technology Combines keyboard and mouse functions High-sensitive touchpad design with adjustable DPI QWERTY mini keyboard with 70 keys Ergonomic design， convenient to operate Plug and play Laser pointer with remote control Great for multimedia teaching， presentation， conferences and other events General Specs Brand & Model Rii RT-MWK10   Wireless Technology 2.4GHz RF Operating Range Up to 10 m/30 feet Battery Built-in rechargeable lithium battery Working Voltage 3.3V  Working Current <35mA Charging Voltage 4.2-5.05V Charging Current <300mA System Required Windows 2000/XP/Vista/CE/7/Linux (debian-3.1 redhat-9.0-8.10-7.0 ubuntu fedora tested) Operating Temperature -10℃-55℃ Package Details Weight: 139.10 g Size: 18.5*8.8*3.5 cm Package Includes * Rii RT-MWK10 Touchpad 2.4GHz Mini Wireless Keyboard Mouse Combo with Laser * USB Cable * Receiver