Built-in effect and professional anti-howling function, professional reverberation, solve the problem of dry singing voice. bluetooth 5.0 receives accompaniment, high-speed mission, low energy consumption, long distance, anti-interference. bluetooth can be connected to mobile phones, computers, and other devices with bluetooth mission function, and mit the accompaniment music to the receiver through wireless bluetooth, and then mit the accompaniment and human voice to the plugged-in audio device through the receiver. The receiver plug part can be folded 90° for easy angle adjustment. Using UHF, effectively preventing -frequency and anti-interference, with 50 adjustable channels, up to 50 microphones can be used at the same time, meeting the needs of large-scale performances, meetings, classrooms, etc. Super long battery life. The microphone uses a 2500 mAh built-in lithium battery, which can be for 3 hours and can last for 8 to 12 hours, which can meet the needs of a day's performance.Compatible with a variety of devices, plug and play. Can be connected to mobile phones, computers, tablets, , speakers, sound cards, amplifiers, etc. Specification: mitter parameters: Pointing characteristics: cardioid Rated voltage: 3.0V Microphone core: dynamic microphone core Is it built-in battery: built-in lithium battery Charging socket: tpye-c Charging time: about 2-3 hours Battery life: about 8-10 hours Frequency band: UHF Working channel: 50X2 Distortion: Less than 2% Delay: Less than 3ms Frequency response (range): 50-15kHz Dynamic range: 100dB(A) Oscillation mode: crystal oscillation Carrier frequency band (depending on the country): 610MHz-960MHz Maximum current: 120-140mA Dimensions: 245mmx35mm Colour:black Material:Aluminum Alloy Package Contents: 1 set * M50 Wireless Dynamic Microphone 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.