The LARK M2 captures 24-bit 48 kHz audio with a 70 dB signal-to-noise ratio and 115 dB SPL. The receiver features plug-in, class-compliant USB-C connector design compatible with both iOS and Android devices. The transmitter features a dual-interference design with a metallic mesh that protects against dust and 2.4 GHz, infrared, and RFI interference. 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. The charging case is specifically designed to accommodate the plug-in receiver and two transmitter units. Its 750mAh internal battery can recharge the transmitters twice for a total battery life of 40 hours.