... material 3.Dust-proof,attractive,fashionabl for ipad Aluminum Bluetooth Keyboard Specification Bluetooth 2.0 interface standardFrequency: BT2.4-2 ... .4835GHzReceiving sensitivity:-78dBm(Standard)RF output power: up to 4bm as maximum, good for ... 0-5.0V Standby time:150 hoursOptional color: sliverBritish keyboard:10 inch,82 keys,245*95mmBattery:standby time-60days, ...