The universal Bluetooth audio adapter connects your audio entertainment (without Bluetooth) to any Bluetooth smartphone. You can get better sound without wires.Product description 1. After connecting with smartphones and tablets, you can listen to music, videos, games through a good speaker/sound system. 2. DC5V power supply, connect the AUX/RCA audio cable to work normally, if you only plug in the speaker via USB, it will not work.Product attribute Material: plastic Color: Black Power supply: DC5V USB Bluetooth Version: 3.0 Work Frequency: 2.4GHzPackage included: 1 x Bluetooth Audio Receiver 1 x 3.5mm Audio Line cableWarm reminder 1. Please remember that due to the lighting effects, the monitor's brightness / contrast settings / etc's, there will be some slight differences in the color of the pictures and the actual items. Measured by hand, deviations of 1-2 cm are possible. 2. Please leave us a message if you have any questions. We will respond and offer you our best service.