vitalASC Ultra Slim Bluetooth Keyboard for iPad, iPhone, Android, PC, Compact Rechargeable, Black (KB10KA-B) Over 140 long working hours and just 3 hours charging time Ultra-Slim Nice Touch Design with 83 keys, including F key functions. Hassle Free Rechargeable USB PC with provided USB Cable - no battery needed. Bluetooth 3.0 easy wireless and fast connection for operation. Up to 10m operating distance Ultra-Slim Nice Touch Design with 83 keys, including F key functions. Designed for Apple / iPad / iPhone / MAC OS / Android / PC Hassle Free Rechargeable USB PC with provided USB Cable - no battery needed. Over 140 long working hours and just 3 hours charging time