Fangrui Product Details Lossless Conversion: Maximize The Sound Of A Wired Microphone Supports A Wide Range Of Devices: The Microphone Wireless Transmission System Consists Of Two Parts: A Transmitter And A Receiver Lcd Screen Display: The Lcd Display Clearly Displays Working States 14500 Rechargeable Battery: 4 Hours Battery Life, 3 Hours Charging Time, 2000 Times Repeat Use Receiving Distance: Allows You To Move Frely In Use Multiple Sets Of Devices Are Connected: Smart Compatible, Simple And Convenient, Easy To Use, Enjoy The Fun Of Wireless Transmission. Applicable Scenarios:life And Entertainment Assistant. Type:540-590mhz Colour:black Material:aluminum Alloy Package Contents: 1 * Microphone Transmitter 1 * Microphone 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 Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.