This product is based on Bluetooth technology for iPad. 1.1 Use laptop keyboard design with fashionable appearance and good hand feels. 1.2 Built-in high-capacity rechargeable lithium battery, long standby time. More durable. 1.3 With usb interface. Connect the device to PC to charge the keyboard through USB connecting cable. 1.4 Based on Bluetooth V2.0 technology and higher transmission rate, transmission distance is up to 10M. 1.5 Saturation charge in need 2-3 hours,When fully charged, can be sustainable use of about 60 hours. 1.6 Compatible with iPhone3G, 4G and APPLE computers.