Introducing Wireless Bluetooth to Audio: Bluetooth Receiver turns home speakers and car radios into "Bluetooth speakers" without Bluetooth functionality, allowing you to enjoy music wirelessly from your smartphone. Adoption of Bluetooth 5.1 technology: Receiver for Home Stereo System is equipped with a Bluetooth 5.1 chip for high fidelity transmission of Bluetooth audio signals for music streaming to speakers or existing home stereo systems. Supports audio decoding: SBC, AAC, HiFi designed for audio lovers. Switch directly to pairing mode, turn on Bluetooth on your smartphone and select the device to connect. You can connect and use two devices at the same time, and you do not need to disconnect a Bluetooth connection to change playback devices. (Just pause the music on the first phone and play from the second phone to switch). Product Specifications: Audio connector: 3.5mm AUX Input voltage: 4.8 V 5.25 V Continuous RX playback: up to 11 hours Receiving distance: up to 10 meters indoors Material: ABS Color: Black Package Contents: 1 x Audio Adapter Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.