HiFi Sound Quality. Wireless lavalier microphone-Hollyland Lark M1, adopting the advanced DSP Noise Cancellation algorithm, takes one click on the transmitter to turn on and filter out ambient noise for clear audio. With LC3 Codec technology and an enhanced 48kHz/16bit sampling rate, you can count on its high-performance audio quality in virtually any recording environment.8H Battery Life, Type-C Charging. Hollyland Lark M1's charging case was designed for charging and storing two transmitters and receiver, convenient and portable to carry around. The case can charge the whole set for 2 times and keep them working up to 20h. Each TX and RX can work up to 8h. With a USB Type-C interface on each unit, you can charge them while recording. No more low battery panic.