Features: Bluetooth 5.0 Version: Compliant to version 5.0 specifications, backwards compatible to Bluetooth 4.2/4.1/4.0/3.0/2.0/1.0. Support NFC: Built-in chip, you can directly connect with the NFC mobile phone or other support NFC Bluetooth device by touch this receiver. Stream Music on 2 Speakers Simultaneously: With USB, 3.5mm and 2RCA connection options, you can enjoy music Wireless on 2 speakers simultaneously. Support Dual Audio Port to Connect: Come With both 3.5mm and 2RCA audio port, Suitable for more devices (3.5mm cable and 2RCA cable included). Long-Range Wireless Connection: The wireless Bluetooth adapter supports the connection up to 15 meters/49 feet, controlling the music playing in a long distance. Support Auto TURN ON/OFF: Using the charger cable connect with your car/other power, When Start the car or it’s had power, it will auto turn on, and Automatically connect to the device you last connected to. When the car turned off, its will auto turn off. Specifications: Frequency response range: 10HZ-20KHz Signal to noise ratio: >110dB Distortion+noise: Bluetooth version: 5.0 Interface: Stereo Analog / AUX 3.5MM Output impedance: 75? Decoder chip: Bluetooth 5.0 Effective distance: 15 meters Performance: HiFi level Support: A2DP/AVRCP Product size: 109 x 73 x 29mm What's in the box 1 x NFC Bluetooth Audio Receiver; 1 x Micro USB charging cable; 1 x 3.5mm to RCA cable; 1 x 3.5mm Audio Cable.