One To Two Outdoor Recording Lavalier Microphone Noise Canceling Wireless Mics 1. Realize the long-distance distance high-definition radio for webcasting, video vlog shooting, interview radio, video teaching and other occasions use 2. Automatic noise reduction, reverb, monitoring, playback, mute, can be live while charging the phone 3. 2.4G wireless connection, boot automatically connected, easy to operate, support for one tow two people to use 4. Can be used for cell phones, computers and other devices without APP 5. Comes with a charging compartment, 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: digital silicon mark 2. Input voltage: 5V 3. Microphone battery: 130mAh 4. Charging compartment battery: 400mAh 5. Charging time: about 6 hours 6. Signal-to-noise ratio: 64DBM 7. Transmission delay: 15MS 8. Sensitivity: -42DB 9. Frequency range: 20Hz-20KHz 10. Transmission distance: 20 meters without obstacles 11. Dimensions: - RX: 45 x 19.5 x 8.5mm - TX: 48 x 21 x 11.50mm - Charging compartment: 83.5 x 63.2 x 30.4 mm 12. Weight (with packaging): 165g