Latest Upgraded Ultra-High Frequency (UHF) Microphone System. With advanced UHF wireless transmission technology, 200ft line-of-sight operation range with high sound quality, minimizes radio frequency interference generated by other devices. | UHF wireless microphone headset can work with voice amplifier or large speakers. Perfect for office meeting, broadcasting, tour guiding, teaching and so on. Not advice to use while doing high impact movements, because upon jumping or skipping, the mouthpiece does not stay in place, and what is more, every breath you take is amplified loudly to your audience. There is a 3.5mm to 6.35mm adapter coming with the microphone. | 2 in1 Wireless Microphone System: This microphone can be used as a general headset mic or a handheld microphone. The headset part can be removed from the transmitter, and then the transmitter can be a handhold one. | Rechargeable Wireless Headset Microphone: The wireless transmitter & receiver are powered by built-in Lithium batteries. They can be charged simultaneously with the dual USB cable attached. They work 6-8 hours after being charged 3 hours. | Not support cell phone, laptop, AUX, and cannot record. Please use it to amplify your voice ONLY. Amplifier not included.