Quick overview from the supplier:
Bluetooth Music Receiver, TP-LINK HA100
Stream music wirelessly from your smartphone/tablet to any stereo/stand-alone speaker via Bluetooth
Connect with your Bluetooth or NFC-enabled device, using the HA100 or NFC Tag
Connects to any stereo supporting 3.5mm or RCA jacks
Transmits up to 20 meters (66 feet) away, within direct line of sight
Bluetooth 4.1, compatible with all A2DP stereo Bluetooth devices
