M21 2 in 1 Bluetooth 5.0 Transmitter Receiver Wireless Audio Adapter 3.5mm AUX 2RCA Music Adapter with Microphone for TV Headphone Speaker Car Stereo Home Audio System

Features:
2-IN-1 Audio Adapter: One button switches between BT transmitter and BT receiver modes. Upgrades the non-BT devices into BT-enabled ones.
BT 5.0 Connection: Wireless BT 5.0 technology ensures transmitting a strong signal in high-quality and high speed.
Hands-free Call: It works perfectly in the car. With a built-in microphone, it supports hands-free calling. One button to answer and end calls.
NFC Connection: NFC function, close to the device for connection, no need searching. (Make sure that the NFC of your phone is on.)
Dual Audio Port: Comes with 3.5mm audio cable and 2RCA cable, suitable for more audio devices. Can connect 2 speakers simultaneously.