NAXA Electronics NAB Bluetooth Wireless Receiver and Adapter for Music System and Docking System with 30-Pin Connector (Black) Stream music from any Bluetooth transmitting device to any 30-Pin Docking System or music system with 3.5mm jack Works with any Bluetooth device including iPhone, iPod, iPad, Android, Windows Phone, Mobile Phones, Tablets & Laptops Range: Up to approximately 30 feet Bluetooth V.30 EDR with A2DP Built-in rechargeable Lithium-ion battery (~6 hours battery life) with micro USB jack for charging; Automatic detection of 5V power supply