【RX/TX 2-in-1 Receiver & Transmitter】 This 2-in-1 Bluetooth car adapter functions as both a Bluetooth transmitter and receiver with a 3.5mm jack. In transmit mode, stream audio from your non-Bluetooth TV or laptop to speakers or headphones. In receive mode, play music from your Bluetooth phone or tablet on a non-Bluetooth stereo system. 【Widely Used Bluetooth Car Adapter】 Connect this adapter to computers, TVs, projectors (transmit mode), or stereos, speakers, car stereos, home stereos, and wired headphones (receive mode) via the 3.5mm adapter. It's perfect for your car radio, allowing you to connect your phone via Bluetooth for music playback. 【PLUG & PLAY, Fast Charging-C】 This Bluetooth car transmitter is plug-and-play with no app installation needed. It features an integrated microphone for clear hands-free calls. With a high-capacity 150mAh rechargeable lithium battery, it supports working while charging, offering 8 hours of receive time and 5 hours of work time. It comes with a 49cm fast charging cable for quick power-ups. 【Bluetooth Version 5.1, High Performance & Stability】 Backward compatible with Bluetooth V5.0, V4.2, V4.1. Equipped with a powerful Bluetooth 5.1 chip, it ensures clear and stable signal transmission with no connection drops. The integrated independent antenna enhances the Bluetooth signal, providing long-range coverage and stable transmission up to 10 meters.