One To Two Outdoor Recording Lavalier Microphone Noise Canceling Wireless Mics 1. Realize long-distance high-definition radio for live webcasting, video vlog shooting, interviews, audio, video teaching and other occasions use 2. Automatic noise reduction, reverb, monitoring, playback, mute, can be live while charging the phone 3. Wireless pair connection, boot automatically connected, simple operation, support one tow two people use 4. Can be used for cell phones, computers and other devices without APP 5. Comes with a charging compartment, you can charge the microphone, convenient storage, portable out of the house 6. Wireless transmission technology brings stronger signal transmission, signal synchronization without delay 7. DSP intelligent noise reduction technology, filter excess noise, more clear vocals Parameters: 1. Microphone head: digital silicon mark 2. Input voltage: 5V 3. Microphone battery: 60mAh 4. Charging compartment battery: 600mAh 5. Continuity: 6-8 hours 6. Signal-to-noise ratio: 64DBM 7. Transmission Delay: 30MS 8. Sensitivity: -42DB 9. Frequency range: 20Hz-20KHz 10. Transmission distance: 20 meters without obstacles 11. Size (with color box): 11.5 x 10.5 x 3.6cm 12. Weight (including packaging): 158g