Features: Easy to upgrade your old style speaker, amplifier, TV or car stereo system to Bluetooth hands-free wireless audio! Bluetooth 5.0 version with HG external singal antenna, provides stronger and stable signal transmission up to 40 meters/130 feet without any disconnection. Low Latency, HD HiFi subwoofer effects, lossless sound quality make it ideal for watching TV/movies. Support connecting with two Bluetooth headphones at the same time, you can share the fun with your family or friends without disturbing any others. Equipped with power-off memory chip, which supports automatic pairing to the existing devices with the previous mode, song, frequency, etc. Bluetooth Transmitter mode: wirelessly streams audio from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth enabled headphones or speakers. Bluetooth Receiver mode: wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo/speakers/headphones/car stereo by the 3.5mm/RCA audio cable. U-disk music play mode: directly plug the U-disk into this device, streams audio to your wired stereo/speakers/headphones/car stereo by the 3.5mm/RCA audio cable. Wide Compatibility: With the included 3.5mm/RCA cable, this 3in1 Receiver Transmitter adapter can widely be used on your computer, laptop, home stereo system, headphones, smartphones, Mp3 players, CD players, car stereo etc. Specifications: Bluetooth Version: Bluetooth 5.0 + EDR Bluetooth Protocol: A2DP/AVCDP Interface: RCA/AUX/USB Power input: DC5V Frequency Response Range: 10Hz-20KHz S/N Ratio: >90dB Distortion + Noise: >0.02% Operation Range: Up to 40m / 130ft (without any blocking objects) Size: 108*65*26mm Weight: About 77g Package Includes: 1 x Bluetooth Transmitter & Receiver Adapter 1 x USB Type C Charging Cable 1 x 3.5mm to RCA Audio Cable 1 x User Manual