Hollyland Lark M2 Wireless Lavalier Microphone with Iphone Lightning Plug Duo,Shine Charcoal - Black

Mic Sensitivity    -37 dBV ± 2dB @ 1 KHz, 94dB SPL
Wireless Modulation Mode    GFSK 2 Mbps
Transmission Range    Mobile Version: Up to 1000ft (300m) for LOS/200ft (60m) for NLOS 
Mic Polar Pattern    Omnidirectiona
Frequency Response    20 Hz–20 kHz
Signal-to-Noise Ratio    > 70dB
Sound Pressure Level    115dB SPL
Bit Depth    24-bit
Sample Rate    48 kHz
Battery Voltage    RX: 3.87V Mobile Version
Mobile Version Charging Case: 3.8V
Battery Capacity    Mobile Version Charging Case: 750 mAh
Operating Time    Mobile Version Charging Case: > 2 times charging for the whole set
Charging Time    Mobile Version Charging Case: < 1.5 hours
Charging Temperature    0° C to 45° C
Operating Temperature    –10° C to 45° C
Dimensions    Mobile Version RX: Approx. 40mm x 16.5mm x 9mm (1.6” x 0.6” x 0.4”)
Mobile Version Charging Case: Approx. 75.8mm x 49.8mm x 35mm (3.0” x 2.0” x 1.4”)