J20 Lavalier Microphone,Spec: Fully Adapted Interface 1. One button three levs of noise reduction, easy to use 2. 360 degree high fidity sound pickup: 48K 16 lossless radio, using high sensitivity microphone, with digital processing technology, restore high fidity sound 3. Transmitter with charging box can work for 24 hours, long battery life 4. Line-of-sight transmission up to 50 meters, stable radio, more stable creation5 Dual-chann radio system: by a receiver and two transmitters, can simultaneously capture two sources of sound, the perfect solution for two people VLOG and two people live 6. Small size, light weight, with a flat design with a clip as light as nothing, more aesthetic 7. Furry wind shid can effectivy suppress wind noise, in windy or noisy environment can still be included in the clear sound. 8. Plug and play, support cl phone charging at the same timeParameters: 1. Wiress transmission: Bluetooth protocol, 2.4GHz adaptive frequency modulation 2. Working distance: 50 meters 3. Built-in microphone: -38dB +/-3db omnidirectional condenser microphone 4. Frequency response range: 20Hz-20KHz 5. Headphone monitoring: adaptable to TYPE-C interface headphones 6. Support reverb function, support three-stage noise reduction 7. Using time: TX-8 hours, RX-8 hours, 24 hours with the charging case 8. Charging time: TX-1.5 hours, RX-1.5 hours, charging box: 1.5 hours