Brand: Hollyland Type: Camera Microphones Model: LARK M2 Color: Black Connectivity Technology: Wireless Connector Type: 3.5 mm Jack Material: Metal Microphone Form Factor: Lavalier Transmission Range: Up to 1000ft (300m) for LOS/130ft (40m) for NLOS Bit Depth: 24-bit Mic Polar Pattern: Omnidirectional Frequency Response: 20 Hz–20 kHz Sound Pressure Level: 115dB SPL Voltage: 3.87 V Sample Rate: 48 kHz Power Source: 3 Lithium Ion batteries required Signal-to-Noise Ratio: 70 dB Weight: 9 g Dimensions: 40mm x 25.7mm x 20.5mm Battery Capacity: Camera Version RX: 145 mAh Battery Life: 40 Hours Mic Sensitivity: -37 dBV ± 2dB @ 1 KHz, 94dB SPL Wireless Modulation Mode: GFSK 2 Mbps Features: At only 9g, the transmitter (TX) is small enough to stay securely fastened to your clothing without any drooping or sagging. Its button-size design is practical, convenient and doesn't compromise audio quality, Noise-Free and Stable Wireless Transmission Working Time: 10 Hours