Rechargeable Bluetooth V2.0 + EDR 49-Key Keyboard Hard Case for Iphone 4 / 4S - Black
Material: ABS Plastic - Bluetooth V2.0 + EDR connection technology - Frequency: 2.4GHz~2.4835GHz - 49-Key - Built-in 500mAh rechargeable battery - Operating range up to 10 meters - Charging time: 3~4 hours - Standby time: 10 hours - Working time: 10 hours - Comes with USB charging cable (68cm) and English user manual