Hollyland Wireless Magnetic Mini Microphone: Lark A1 Mini Duo Wireless Mic for iPhone/iPad with MFI Certified Lightning Interface, 3-Lv Noise Cancel, 200m(650ft) Range for Android and apple Type C mobile phones

Specs Mic Sensitivity -37dBV±2dBV@1KHz,94dBSPL Wireless Modulation Mode GFSK 2Mbps Wireless Transmission 2.4 GHz Adaptive Frequency Hopping (AFH) Transmission Range TX: 200m Mic Polar Pattern Omnidirectional Frequency Response 20 Hz – 20 kHz Signal-to-Noise Ratio ≥67dB Max Sound Pressure Level 120dB SPL Sample Rate and Bit Depth 48kHz, 24-bit Battery Voltage TX: 3.8V Charging Case: 3.7V Battery Capacity TX: 65 mAh Charging Case: 460 mAh Operating Time TX: Approx. 9 hours Charging Cycle TX: <1.5H Charging Case: <1.5H Charging Time Charging Case: > 2 times charging for 2 Mic Charging Temperature 0 ~ 45℃ Operating Temperature -10 ~ 60℃ Dimensions TX: 30*16.3*8.8mm Mobile Version RX: 34*16.3*9mm Weight TX: Approx. 8g Mobile Version RX: Approx. 5.9g