BLUETOOTH TRANSMITTER RECEIVER 2 IN 1 - This aux bluetooth adapter is a bluetooth receiver for car, it's also a bluetooth transmitter for tv headphones. This 3.5mm bluetooth adapter can be changed into transmitter/receiver mode as you want, it works for almost all devices with audio input/output (3.5mm aux audio interface), and it's the perfect solution for non-Bluetooth devices to achieve wireless audio, such as car stereo, tv, PC, headphone, speakers, soundbar, home theater, etc | EASY TO USE - ① Transmitter Mode: plug the bluetooth aux adapter into non-Bluetooth audio sources (TV, PC, Car Stereo, etc), the Bluetooth transmitter will automatically pair the Bluetooth output devices ② Receiver mode: plug the aux bluetooth adapter into non-Bluetooth audio output device (home car stereo, headphones, speakers, etc), let the Bluetooth audio sources (smart phone, tablet, Bluetooth TV/PC) match the signal of adapter, then you can play music | FREE YOUR HANDS DURING DRIVING - On receiver mode, you can use this 3.5 mm bluetooth aux adapter as an audio receiver for listening to music or live streaming, and you can also use it to turn on/off/pause/play music. You don't have to look at the phone on the go. The built-in microphone and the "M" button will help you get full access to music and phone call controls, it ensures your driving safety | NEW VERSION - This upgraded bluetooth car adapter aux input uses CVC8.0 noise suppression technology, the bluetooth receiver for car can ensure clear listening and authentic voice transmission, eliminate echo and block out annoying background noise (such as wind, traffic, or crowds). The 2 in 1 bluetooth transmitter receiver is also rechargeable, so you can use it everywhere. No need for external power | NOTE - The longest signal transmission distance of this bluetooth aux adapter is 10M, the actual transmission is affected by the space limit, please kindly understand this. The bluetooth aux adapter is great for cars, TVs, headphones, PCs, etc. If you want more other bluetooth adapters for your devices, you can also search "TOZEEZOT bluetooth transmitter receiver", they're also great. If you have any problem with the product, please feel free to tell us, we will help you