Multi-function Keyboard3-in-1 multifunction keyboard (keyboard, touchpad, pen) is with 400mAh battery capacity. KeyboardUsing 2.4G radio technology with built-in backlight, keyboard is easy to use. Mini KeyboardFor QWERTY full-featured mini keyboard, you can switch whether the touchpad is used horizontally or vertically. Widely ApplicableAnd such a pocket keyboard supports system for 2000 / / Vista / 7 / OS 10.x or lower / Linux. Short Charging TimeWith 69 keys, supports USB interface, the charging time of this key board is 3.5-4h.