Performance Parameters:
Wireless distance: about 15-20m/49.21-65.62ft
Life time: 12 hours
Frequency response: 20Hz-20KHz
Resistance: 680 Ohm
Microphone size: about 9.7*5.0mm/0.38*0.20in
Sensitivity: -52dB ± 1.5dB (0dB = 1Pa)
Directivity: single directivity, heart-shaped directivity
Packing List:
1*Head-mounted FM Microphone
1*USB Charging Cable
1* Instruction Manual