2 IN 1 RX/TX, RECEIVER AND TRANSMITTERThe 2 in 1 Bluetooth Car Adapter can be used as a Bluetooth transmitter or Bluetooth receiver at the same time with 3.5mm aux jack. In transmission mode, audio signals from your non-Bluetooth enabled TV or laptop can be streamed to Bluetooth speakers or headphones. In RX mode, music can be streamed from your phone or tablet Bluetooth device to a stereo system without Bluetooth. WIDELY USED CAR BLUETOOTH ADAPTERThis Bluetooth car adapter can connect to computer, TV, projector (transmitter mode) and stereo, speakers, car stereo, regular stereo and wired headphones (receive mode) via the 3.5mm AUX adapter. This auxiliary Bluetooth adapter can be plugged into the car stereo and connected to the phone's Bluetooth function to play music. PLUG & PLAY, TYPE-C FAST CHARGEThis car bluetooth transmitter is plug and play, no need to install APP, built-in microphone, which can realize clear hands-free calls.Built-in 150mAh high-capacity rechargeable lithium battery, support working while charging, 8 hours receiving working time, 5 hours transmitting working time. We provide a 49cm Type-C fast charging cable, which can be charged quickly. BLUETOOTH VERSION 5.1, HIGH PERFORMANCE AND STABILITY Backward compatible with Bluetooth V5.0, V4.2, V4.1. Equipped with a powerful Bluetooth 5.1 chip, which ensures that the Bluetooth signal transmission is clear and stable, and the connection does not get stuck. The built-in independent antenna can improve the Bluetooth signal, achieve a long signal coverage range, and achieve a stable transmission over a long distance of 10m.