Product Features: Dual Device Link: Simultaneously pair your smartphone and tablet and stream music from either device to any stereo system that supports a standard 3.5mm jack. Connect two Bluetooth devices at once to listen to music, make phone calls, and more. Supports connection via 3.5mm o port and 2 o port at the same time. Hands-free Calling & Navigation Broadcast: Built-in microphone enables hands-free calls. One simple button to answer, redial, hang up, or reject calls. The Bluetooth car adapter supports broadcasting voice notifications from existing navigation apps, allowing safer driving without looking at your phone. Wireless Music Streaming: Stream stereo music wirelessly to non-Bluetooth headphones and speakers. Space-Saving Design: Ultra-compact design for convenient use with a variety of devices. Super Stable Connection: Equipped with a Bluetooth 5.3 chip for stable pairing, fast transmission, and an extended signal range up to 33 feet. With the 3.5mm AUX port and 2 port, it can connect to non-Bluetooth car o systems, home stereos, wired headphones/speakers, amplifiers, home theaters, and more. Enjoy wireless Hi-fi music streaming. Note: This is a Bluetooth receiver only, not a transmitter. It cannot be used with TVs, keyboards, or mice. Auto-Connect: The Bluetooth receiver automatically connects to the last paired device when powered on. 3-KEY Controls: Next song / Volume Up, Previous song / Volume Down, Multifunction Button. Note: No built-in battery; powered via USB. Color: Black Material: Plastic + Metal Package Contents: 1 x Bluetooth adapter 1 x 3.5mm o cable 1 x USB charging cable Only the items listed are included; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.