1,61 keys 2,for Apple OS 3,Aluminum alloy material 4,Bluetooth 3.0 interface stand 5,bluetooth keyboard for mini ... Aluminum alloy material4,Bluetooth 3.0 interface stand 5,bluetooth keyboard for mini ipad Bluetooth 3.0 interface USA broadcom ... hours Standby time:150 hoursRechargeable keyboardOptional color: sliver .blackBritish keyboard:61 keys, 20*13.5*0.95cmBattery:standby time-60days,Uninterrupted ...