Bluetooth 5.0 receives accompaniment, high-speed transmission, low energy consumption, long distance, anti-interference. bluetooth can be connected to mobile phones, computers, 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. Built-in effect and professional anti-howling function, professional reverberation, solve the problem of dry singing voice. 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. Kind tips: The microphone cannot be used directly on mobile phones, , computers, and other equipment. Directly used equipment: audio, live broadcast sound card, power amplifier, mixer, mixer, home theater, KTV set, large bus, etc. All devices with MIC/microphone/AUX jacks can be used. 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 2-3hours Battery life:about 8-10hours 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 Receiver parameters: Dimensions:115mmx45mm Signal-to-noise ratio: equal 50dB(A) bluetooth version:5.0 bluetooth name:-88 bluetooth receiving distance:5-8meters Is it built-in battery:built-in Charging method:direct charging Charging socket:tpye-c Socket specification:3.5 Charging time:about 4hours Battery life:about 5-6hours Sensitivity:5dBUV Function:with bluetooth/anti-howling Socket specification:3.5 Input audio interface specification:bluetooth Receiving mode:UHF Distortion:Less than 2% Frequency response:50Hz-15KHz Maximum current:310mA Sound amplification function:yes Colour:Black Material:Metal Package Contents: 2 * Wireless Microphone 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.