Specifications Color: Black Chipset: Broadcom 2042 Chipset Systems Supported: 1. USB Port - Windows 7, 98, Me, NT, 2000, Mac, Vista, XP 2. Android 2.1+ 3. iPhone 4. Supports Windows/Mac OS computers/laptops 5. Supports Sony Playstation 3 6. Supports Apple iPad, iPad 2 7. Supports HTPC with built-in Bluetooth Working current: 2.5-3.0MA Sleep current: 0.2mA Working voltage: 3.7V Frequency band: 2.4 - 2.4835GHz unlicensed ISM band Receiving sensitivity: -75dbm (standard) RF output power: 4dbm maximum Working Range: Up to 10 meters Bluetooth Version: 3.0 Keyboard Format: 49 keys, QWERTY layout Battery: Built-in 300mAh Rechargeable Li-ion Battery Battery Duration: Constant Use: 50 hours Standby: 400 hours Power: Charges by USB Charging Time: 3-4 hours Package Included: Wireless Bluetooth keyboard USB charging cable User guide