The Esinkin Bluetooth Audio Adapter Is A Wireless Adapter That Can Be Used With Listen music wireless: Connect with computer speakers, home stereo systems or other speaker systems via the 3.5 mm or RCA cable, then pair with the Bluetooth audio devices such as smartphones or tablet for streaming music. Easy setup and automatic reconnect: Pair your device to the adapter once with a single button press. It can reconnect automatically with the previously paired device. Wireless range: Indoors(without obstacles) connect rang up 30-40 ft (10-12 m). Works with most device: Bluetooth enabled device including smartphones, tablets, computers, laptops upon and any powered PC speakers, home stereo systems and A/V receivers. NOTE: This adapter doesn't have built-in battery, power by AC to DC power adapter or USB cable. This product is a bluetooth receiver ONLY, not a bluetooth transmitter. Only to give Bluetooth capabilities to an existing stereo / powered speaker / PA.