Item Type: Wireless Tie Clip MicrophoneMaterial: TPEColor: Black Weight: Approx. 106.0g/3.7ozAudio signal: Digital SampleFrequency Range: 550.5MHZ-589.5MHZPairing: Auto Pairing Frequency Response: 50Hz-8KHzTransmission Mode:  UHFPower Consumption: Electric Current <75mAPower Supply: Built-in Li-ion battery 400mAhAudio Output: Mixed Output Mic: CapacitiveMode of Frequency: Automatic PairingWireless Distance: Approx. 50M/164.0ft in Classroom 1?��Made of environmental friendly TPE material, which is flexible and durable and is resistant to pulling and anti?entanglement.? 2?��The frequency of microphone is U segment frequency conversion, and multiple frequency points can be adjusted,multi?groups can be used at the same time.? 3?��Small and portable, easy to wear and beautiful, using professional noise reduction technology, which makes the sound clear.? 4?��UHF frequency band, stable signal, open and barrier?free transmission and recording within a range of 50m/160ft, no matter the distance of the mobile phone, the recorded sound is as clear and stable.? 5?��UHF wireless microphone is small, easy to use and easy to operate with one hand.