Feature 1 Using professional imported moving coil microphone, to a great extent restore the human voice, specially added sound filter cotton, can filter in addition to the human voice noise. 2 Anti Interference: When multiple sets of machines are used on the same occasion, different frequency points can be selected to avoid interference and frequency series 3 Applicable: Multi group frequency point selection, can be manually adjusted frequency. Suitable for most audio equipment with 6.5mm interface, plug and play. 4 Charing Ways: USB power supply design, as long as it is 5V can be power supply, computer, charger, etc. Microphone and receiver are shipped without batteries. 5 Superior Performance: UHF wireless microphone system makes it simple to get great sound out of a dependable wireless system and offering you great freedom of movement.Item Type: Wireless UHF MicrophoneMaterial: Aluminium AlloyModulation Mode: Digital Frequency Modulation Frequency Range: 700mhz-800mhz Receiving Distance: 20m-100m/65.6ft-328.1ft in Open Space Frequency Response: 50HZ-18khz SNR: >90dB Distortion: 0.5%at1KHZ+ Output Level: 200MV 5MV Wireless Receiver Battery Type: 1 x 18650 Battery (Not Included) Microphone Battery Type: 2 x AA Batteries (Not Included) Package List2 x Microphone 1 x Charging Line 1 x Receiver 2 x Silicone Non Slip Sleeve1 x Description NoteThe receiver frequency is subject to the actual product.