Proove Demo Wireless Microphone Microphone Charging Case Mic Portable Audio Video Recording for iPhone Android Live Gaming Mic: Material: ABS plasticColor: blackSilicon microphone type: digitalInput voltage: 5VMicrophone battery: 60 mAhCharging Case battery: 600 mAhWorking hours: 6-8 hoursSignal to noise ratio: 64 dBmTransmission delay: 30 msSensitivity: ± 42 dBFrequency response range: 20-20000 HzTransmission distance: 20