Product Features: 1. Auto On: Turns on automatically when connected to power, making it convenient for use in cars or other applications requiring auto-on functionality. 2. Dual Device Link: Simultaneously pair your smartphone and tablet to stream music from either device through any stereo system supporting a standard 3.5mm jack. Connect two Bluetooth devices at once for music playback, phone calls, and more. 3. Dual Audio Connection: Supports simultaneous connection via 3.5mm audio port and auxiliary input. 4. Hands-Free Calling & Navigation Broadcast: Built-in microphone enables hands-free calling. One-button control to answer, redial, hang up, or reject calls. Supports broadcast of voice notifications from navigation apps for safer driving. 5. Wireless Music Streaming: Stream stereo audio to non-Bluetooth headphones and speakers wirelessly. 6. Space-Saving Design: Ultra-compact design for convenient use with a variety of devices. 7. Stable Connection: Equipped with Bluetooth 5.3 technology for reliable pairing, fast transmission, and an extended signal range up to 33 feet. Connects to non-Bluetooth car audio systems, home stereos, wired headphones/speakers, amplifiers, and home theaters via 3.5mm AUX and auxiliary ports for wireless Hi-Fi music streaming. Note: This is a Bluetooth receiver only, not a transmitter. It cannot be used with TVs, keyboards, or mice. 8. Auto-Connect: Automatically reconnects to the last paired Bluetooth device upon power-on. 9. 3-Key Control: Next track/Volume up, Previous track/Volume down, Multifunction button. Material: Plastic Color: Black Package Contents: 1 x Bluetooth 5.3 Audio Receiver 1 x USB Cable 1 x Audio Cable 1 x Cable (Random color, no color selection available) Note: Wiring colors are shipped randomly; no specific color requests accepted. Contents limited to items listed above; other products not included. Note: Lighting and display differences may cause slight variations in color between the product image and actual item. Measurement error allowance: +/- 1-3 cm.