Fangrui Product Details 1. Module Size Is Small, Tx=48.5x17mm Rx=42x17mm,easy To Install. 2. Pure Digital Transmission,strong Anti-interference Ability 3. Sound Transmission Delay Is Small, Only 3ms. 4. Transmit Power Up18dbm, Transmission Distance Is Far 5. Fool Type, Simple Wiring, No Need To Debug, Works As Long As The Wiring Is Correct. Default Frequency 750mhz The Module Comes With A Detachable Special Antenna. Working Power Supply:dc5.0v Transmit Power:18dbm Receiving Sensitivity:-95dbm Audio Signal To Noise Ratio:96db Sampling Rate:48khz Transmission Rate:204.8ksps Launch Band:uhf(500-980mhz) Application Scenario: Wired Speaker Wireless Speaker, Wireless Microphone, Long-distance Audio Transmission, Etc. Due To Different Product Batches, The Appearance May Vary, Which Does Not Affect The Use. Colour:as Shown Material:pc Package Contents: 1 * Transmitter 1 * Receiver Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Pict