Features : Made of high-quality material, durable and tough, wear-resistant and corrosion-resistant. 2 in 1 design, used as Bluetooth receiver and Bluetooth transmitter.Equipped with LED display, you can easily know the Bluetooth mode and working status, easy to operate and use. Buletooth 5.0, offering stereo sound and stable signals, with 10 meters wireless transmission, suitable for home and car use. Equipped with 500mAh battery, don't worry about sudden shutdown, USB charging, it can be used for about 10 hours for continuous listening to music, the standby time can be up to 30 days. Supports multiple ports such as 3.5mm AUX, Cinch, Digital Optical, Coaxial, USB (memory card), TF interface to meet your different requirements. Technical data: Bluetooth version: Bluetooth 5.0 Transmission range: 10 meters (unobstructed) Interface: 3.5mm Aux / 2RCA / Coaxial / Optical Input: DC 5V 2.1A (Max. ) Support protocol: A2DP / AVRCP Bluetooth version: Bluetooth 5.0 Size: About 9.2 x 6.5 x 2cm Battery capacity: 3.7V 500mAh Using Time: About 10 hours listening to music / 30 days standby Basic functions: Bluetooth reception, Bluetooth transmission, U disk play, TFcard play, IR remote control, key operation, digital optical / coaxial input, NFC Supported hardware: all kinds of speakers, desktops, notebooks, televisions, power amplifiers, projectors Packing List: 1 x Bluetooth adapter 1x3.5mm cable 1 x 3.5mm RCA cable 1 x Micro USB cable 1 x remote control 1 x User Manual