Chorse BX 4400 HD Audio Bluetooth Music Receiver | Aux Bluetooth Adapter Bluetooth Receiver: turn any speakers, headphones, stereo system to Bluetooth enabled Sync your cell phone or other Bluetooth device to this Bluetooth Receiver equipped with a standard auxiliary/headphone jack HD Audio Signal receives up to 33-feet away Built-in Lithium-ion rechargeable battery (cable included to charge via computer's USB port) 100% Satisfaction Guarantee  Return for ANY REASON for a FULL REFUND