Microphone: 5.7mm * 5, 2mm ± 0.5mmVoltage: 3.7V
Working current: 300mah-1000maEnvironmental noise: ≤ 60dB (a)Receiver impedance: 150 ohmMicrophone sensitivity: 36 ± 3dBComputer USB interfaceEarphone cable: 1.8m ± 0.2m (curved rope)Weight of single bare machine: 0.14kgSingle gross weight: 0.185kgSingle package size: 17.4cm * 14.5cm * 7cm