The LARK M2 captures 24-bit 48 kHz audio with a 70 dB signal-to-noise ratio and 115 dB SPL. Record up to two people in mobile journalism or content creation applications using this shine charcoal Connect your LARK M2 system to the LarkSound App to adjust parameters like volume and noise cancellation, update firmware, or check real-time audio status The transmitters feature a 90mAh internal battery with a 10-hour battery life. Once depleted, recharge the transmitters in the included charging case or via USB-C ports.