Features: BT5.0 Connection: BT 5.0 version, low latency audio receiver & transmitter, equipped with the smart chip to ensure the stronger and more stable transmission. Supports 40M long distance transmission. Receiver Mode: Change the traditional car stereo system or home audio system into BT-enabled ones. After paired, play music wirelessly from your BT-enabled smartphones, tablet PCs, etc. Transmitter Mode: Connected to the non-BT audio devices (such as MP3, MP4, TV, and PC, etc.), changing them into BT-enabled ones, and making it work with BT headset and speaker. Strong Compatibility: Comes with both 3.5mm and 2RCA audio port, this audio adapter can be used on your computer, laptop, home stereo system, headphone, smartphone, etc. (3.5mm to RCA cable is included.) Convenient to Use: Switch between transmitter and receiver modes with one button. It also supports U disk playback and power-off memory function. Specifications: Model Number: T-R22 BT Version: 5.0+EDR Protocol Supported: A2DP, AVRCP (receiver mode only) Transmission Distance: 40m (open space) Interface: RCA, AUX, USB Frequency Response: 10Hz-20kHz SNR: >90dB Distortion: >0.02% Color: Black Main Item Size: approx. 10.5*6.5*2.7cm/4.13*2.56*1.06in Main Item Weight: 77g/2.71oz Package Size: 16.8*9.5*3.6cm/6.61*3.74*1.41in Package Weight: 168g/5.92oz Package List: 1 * BT Audio Transmitter & Receiver 1 * 3.5mm to RCA Audio Cable 1 * Type-C Charging Cable 1 * User Manual (English/Chinese)