3.5 mm Stereo Wireless Bluetooth Receiver Transmission distance: Up to 33 feet(10 meters) away. Red and blue LED indicator design that is beautiful and humane. Simple Operation: 3.5 mm audio cable to connect the speakers and the receiver Powered by PC USB port or embedded long life-span battery， battery can be charged via any USB port High performance AMP chip， can push the headset， and high-power speaker， applicable to all types of speakers. Complies with Bluetooth 2.1， adding the ability to listen wireless through your existing 3.5 mm wired headphones Supports digital Bluetooth enabled devices，such as iPad， iPhone， Bluetooth cell phone， Bluetooth PC and Bluetooth MP 3/4/5 Music Receiver Size: Approx. 6 x 3.5 x 1cmPackage Included: 1 x Wireless Bluetooth Music Receiver 1 x Mini USB Power Cable 1 x 3.5mm Male to Male Stereo Audio Cable