UHF dual-channel receiving design, and the microphone and receiver adopt infrared synchronous frequency matching function. The receiver is equipped with a 6.35MM plug, which is plug-and-play. The characteristics of being light and portable and cost-effective will effectively replace large receivers and become the best choice for home entertainment, small conferences, outdoor audio and other occasions. The handheld microphone adopts an all-aluminum alloy handle with the latest generation of KT chip transmission line design to ensure the stability of the transmission signal. It has a stable and wide frequency response curve with a customized dynamic sound head, clear and natural treble, powerful mid-frequency, and mellow low frequency. The handheld microphone has multi-functional adjustment performance (including ECHO, high and low frequencies, and volume). The microphone uses LCD display, and the usage status is clear at a glance. The ideal distance is more than 50 meters, and 30 meters in complex environments. Receiver:Frequency range: UHF 640-690MHz (A.B 100 channels each, total 200 channels) Frequency stability: 0.05% Dynamic range: Greater than 90Db Modulation mode: FM (frequency modulation) Frequency response: 60Hz-15KHz Signal-to-noise ratio: greater than equal 90dB Adjacent channel interference ratio: Greater than 80dB Image interference ratio: Greater than 80dB Usage range: greater than equal 50 meters Meters (open area) Receiver power supply: 18650 rechargeable battery (3.7V/1300mA) Transmitter (microphone): Carrier frequency: UHF640-690MHz (adjustable in frequency bands) Frequency stability: 25KHz Signal-to-noise ratio: Greater than 105 dB Dynamic range: greater than equal 100 dB Type: dynamic or capacitive Polarity mode: single direction Frequency response: 70Hz-13KHz Microphone sensitivity: -473dB 1KHz Power supply: DC 3V (1.5VAAx2) note: The color and appearance of the battery are random, and the battery does not accept specified appearance and color. The color of the slip ring and USB cable is random, and the slip ring and USB cable do not accept specified color. Colour:Black Material:Aluminum Alloy Package Contents: 2 x Wireless Microphone 1 x Receiver 4 x AA Battery(The battery color is random, no specified color is accepted) 1 x 18650 Battery(The battery color is random, no specified color is accepted) 1 x USB cable(The color random, no specified color is accepted) 2 x slip ring(The color random, no specified color is accepted) 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.