Feature:1. 3in1 multifunction wireless keyboard (keyboard, touchpad, laser pen) is with 400mAh battery capacity.2. Using 2.4G radio technology with builtin backlight, wireless keyboard is easy to use.3. For QWERTY fullfeatured mini keyboard, you can switch whether the touchpad is used horizontally or vertically.4. And such a pocket keyboard supports system for Win 2000 / XP / Vista / 7 / OS 10.x or lower / Linux .5. With 69 keys, supports USB interface, the charging time of this key board is 3.54h.Specification:Item Type: KeyboardBuilt-in Battery Model: GRP6618055 lithium batteryBattery Capacity: 400mAhInterface: USBNumber of Keys: 69 keysCharging Time: 3.5-4hStandby: 500-700hSupport System: For Win 2000 / XP / Vista / 7,For OS 10.x or lower,For Linux ( For Debian 3.1 / Redhat 9.0 / Ubuntu 8.10 / Fedora 7.0).Package List:1 x Keyboard1 x USB Receiver1 x USB Charging Cable1 x Instruction Manual