Description Features: Power by USB Charger,PC,Powerbank and other 5V USB devices. The blue LED indicator shows the working status of the product. Fit for Speaker Headphones 3.5mm earphones Car AUX and more 3.5mm input devices. Make your audio entertainment(without Bluetooth) connect with any Bluetooth-compatible smartphone; Better sound without wires : After connected with smartphone, tablet... you can listen the music, video,games through your good speakers /sound system; for DC 5V power supply, connecting AUX / RCA audio Line to work, it will not work if you are Inserting Speakers with alone USB; Easy Installation: - Plug it to your car AUX port or Home AV surrounding system via the 3.5mm audio cable or the 3.5mm connector; - Find it on the Bluetooth-compatible list of your Phone, and connect it. - Successful parting, for play music without wires. Specification: Fashion design, Brand New,high quality! Material: Plastic Color: Black Size: 2.91.41cm 3.5mm cable length:30cm Bluetooth-compatible name: X1 Bluetooth-compatible distance: 5-10 meters Power supply: for DC 5V USB Bluetooth-compatible Version: 4.2 Work Frequency: 2.4GHz Package Included: 1 USB Bluetooth-compatible Audio Receiver 1 3.5mm Audio Line cable