Product parameters
Microphone: Digital silicon mark
Input voltage: 5V
Battery capacity: 50 mah
Battery life: 4-5 hours 6-8 hours
Signal-to-noise ratio: 64DBM Adaptive noise
reduction Transmission delay: 30MS
Sensitivity: -41DB
Frequency response range: 20-20KHZ
Transmission distance: Barrier-free 20m-30m