Specification: Material: Plastic Shell Color: BlackKeyboard Layout Type: QWERTY Full KeyboardWorking distance: 15m Button: touchpad Battery type: built-in battery Battery voltage:4.4V-5.2V Battery specification: BL-5B Battery capacity: 300MA Size: 142 * 90 * 15mm / 5.6 * 3.5 * 0.6in Weight: Approx. 173g Packing List: 1 * Keyboard 1 * Power Cable 1 * USB Receiver 1 * Manual Plug and Play: Remote with mini wireless keyboard is connected by a stable powerful 2.4GHz RF technology, just plug USB receiver,the transmission distance can up to 15m. Support System: The mini keyboard can support for Computer 2000/XP/Vista/CE/7, for Linux (Debian-3.1, Redhat-9.0 Ubuntu-8.10 Fedora-7.0 test), for Android OS (with standard USB interface). Wide Applications: The keyboard is suitable for PC, tablet, HTPC, IPTV, Internet TV, smart TV, for Google TV, for Android TV box / stick, household appliances, multimedia equipment, etc. Unique Design: The optimization and custom design about small wireless keyboard for Android system realizes the application of intelligent human‑computer interaction and enhances the experience. About Battery: The wireless keyboard with touchpad with built‑in 300mah battery , the service time is very long.