2 Mode-Transmitter and Receiver aux Bluetooth adapter, which is not only a Bluetooth 5.0 receiver, but also a Bluetooth transmitter. can connect to car audio system, home stereo, speaker, and Wired headphone. Using the aux Bluetooth adapter in receive mode, wired devices can play the music that is on your phone; In transmitter mode, Bluetooth devices can receive the sound that on the wired devices.Auto ReconnectionBluetooth car adapter can automatically pair with the last connected phone after powered on. Bluetooth 5.0 Music Audio Receiver will enter pairing mode if the Bluetooth of the last phone is unsearchable.Plug and Play & PortableBluetooth car adapter is designed with power button, when you turn on the aux bluetooth adapter, it will automatically enter the pairing mode. The size of this transmitter is small, you can carry this adapter anywhere. It is a good choice for travel and driving.Hands-free Calling & NavigationThe portable aux Bluetooth adapter for car has built-in microphone and multifunction Button to answer / redial / hang up / reject calls. Answer phone calls without picking up the phone. Make you enjoy complete hands-free calling during driving. Bluetooth aux adapter supports broadcasting voice notification from navigation Apps. You dont have to look down the phone on the move. Having a safe driving.Bluetooth 5.0 & Stable ConnectionWireless audio adapter has stable connection and fast transmission, to offer better quality wireless audio experience while listening to music or making calls. Wireless Bluetooth Music Receiver maintains a strong connection up to 33ft without obstacles (walls, doors, Wi-Fi routers, Wireless TV adapter, etc.) Get yourself freedom from the tangle of audio cables, to enjoy music wherever.