1. Honeycomb-style audio microphone, high-sensitivity microphone, added to the chipset, can effectively reduce the interference of the surrounding environment on the microphone, effectively prevent and thus eliminate whistling. 2. The high-quality metal hose is bent freely, has good elasticity, can be both the size and the head type, can be bent freely, and can be adjusted in any direction when speaking. The metal material has a long service life. 3. The head-mounted bracket and the launching host are detachable and intimate design, which is convenient to carry, and can be used in the hand of the transmitting host, and the handheld microphone is changed in seconds. 4. Built-in -capacity polymer lithium battery, no additional power supply, boot and plug-and-play, can be used for up to 6 hours. 5. Applicable to tour guides, teaching, supermarket promotions, street stalls, dance training, company meetings and other . Model Number:Outdoor Use:Conference Microphone Communication:Wired Patterns:Omnidirectional Set Type:Single Microphone Input Voltage Range: DC3.5V-5.5V; Maximum Current: less than or equal to 75mA Battery Type: Lithium polymer battery Charging Time: Less than 4 hours Continuous Working Time : 8 hours or so Frequency Band: 600-900Mhz RF Transmission Power : 10dBm Transmission Distance : 80m (empty accessibility) RX Sensitivity :-88dBm Sampling Frequency: 48KS/s S Ratio : or equal to 65dB (f=1kHz, P=1Pa A curve) Operating Temperature: 0~40 Celsius colour:black Material:plastic Package Contents: 2*UHF Wireless Mic 1*USB one to two charging cable 1*3.5MM adapter 1*single charging cable 1*Instruction manual Note: This UHF acoustic wireless microphone needs to be usedwith an audio or power amplifier, a loudspeaker, etc., and cannot be independently amplified. As long as there is a microphone jack or audio input jack to insert the receiver, and automatically connect when booting, wireless amplification and KTV function. This UHFsound wireless microphone does not have an audio player! Only the above package content, other products are not included. Note: Light 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.