M50 UHF Dual DSP Wireless Dynamic Karaoke Microphone System Anti-Howling Rechargeable Receiver Plug Play Microphone Set Built-in DSP effect and professional anti-howling function, professional reverberation, solve the problem of dry singing voice. bluetooth 5.0 receives accompaniment, high-speed transmission, low energy consumption, long distance, anti-interference. bluetooth can be connected to mobile phones, computers, TVs and other devices with bluetooth transmission function, and transmit the accompaniment music to the receiver through wireless bluetooth, and then transmit 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 cross-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 charged 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, TVs, speakers, sound cards, amplifiers, etc. Specification: Transmitter 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: Greater than 100dB(A) Oscillation mode: crystal oscillation Carrier frequency band (depending on the country): 610MHz-960MHz Maximum current: 120-140mA Dimensions: 245mmx35mm