Overview: The BT receiver is specially designed for headphones, car stereo systems, and home audio systems, transforming non-BT devices into BT-enabled ones. Easily pair with BT-enabled smartphones, laptops, tablets, etc. Enjoy music from your phone, laptop, MP3 player, and more without the hassle of cables. Features: BT Audio Receiver: Converts traditional speakers, wired headphones, and car stereos into BT-enabled systems. After pairing, wirelessly play music from your BT-enabled audio devices. BT 5.0 Connection: Wireless BT 5.0 technology ensures a strong, high-quality, and high-speed signal transmission. Hands-free Calling: Works perfectly in the car. With a built-in microphone, it supports hands-free calls. One button to answer and end calls, ensuring driving safety. NFC Connection: NFC function, simply bring your device close for connection, no need to search. (Ensure your phone's NFC and BT are turned on.) Dual Audio Port: Comes with 3.5mm and 2 RCA audio ports, suitable for more devices (3.5mm cable and 2RCA cable included). Listen to music wirelessly on 2 speakers simultaneously. Specifications: Model Number: WB11 BT Version: BT 5.0 BT Operating Distance: > 10m (without obstacles / open space) Charging Port: Micro USB 5V / 0.5A Color: Black Item Size: 6 * 6 * 2 cm / 2.36 * 2.36 * 0.78 inches