Stable transmission distance of 30-50 metres with low latency Greater than 5ms for device accessibility. Large capacity rechargeable lithium battery,Lasts up to 4 hours. High-penetration sound, lossless reproduction of vocals. Plug and play , wired microphone to wireless microphone, get rid of the wired trouble. Automatic channel search,Traditional physical button operation is anti-miscontact and more intuitive. TYPE-C cable charging, the device supports 48V condenser and dynamic microphone use. The device supports linking, mixing consoles, small amplifiers, combined amplifiers, sound cards and other devices. One key switch ON/OFF, 48V/0V switching, three gears reverb effect selection, with red, green, blue three colour display. You can also choose to turn off the reverb effect Emitter parameter: Carrier frequency range:2302MHZ-2387MHZ RF power output: 10dB Frequency response:50HZ-15KHZ Microphone pickup: moving-coil type Power Supply: 14500 battery Operating current: 22-24mA Receiver parameters: Carrier frequency range:2302MHZ-2387MHZ Working distance: 50-150 meters (depending on the environment) Working voltage: DC3.7V Operating current: 17.5-20mA Colour:Black Material:Metal Package Contents: 2 x Microphone Receiver 4 x Microphone Transmitter 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.