Audio is transmitted via 2.4 GHz frequency up to 1000' away. Easily capture 24-bit, 48 kHz audio with a 70 dB signal-to-noise ratio and 116 dB SPL. The camera-mount, dual-channel receiver features an integrated camera-mount interface. A 3.5mm TRS output port records audio directly to your device of choice. The transmitters feature 85mAh internal batteries with 9-hour battery life. The camera-mount receiver features a 145mAh internal battery with a 8.5-hour battery life. The mini combo version of the LARK M2S includes a camera-mount receiver and USB-C plug-in receiver. Use the USB-C to Lightning adapter cable for compatibility with older iOS devices. Connect your LARK M2 system to the LarkSound App to adjust parameters like volume and noise cancellation, update firmware, or check real-time audio statusall from your iOS or Android compatible smartphone.