This is a wireless microphone system operating at 2.4 GHz using Adaptive Frequency Hopping (AFH) technology. It provides a transmission range of up to 300 meters in open space and up to 40 meters with obstacles. Lark M2 has an omnidirectional microphone with a sensitivity of -37 dBv ± 2dB @ 1KHz, 94 dB SPL. The system supports 24-bit audio with a sampling frequency of 48 kHz. The battery capacity is TX: 97 mAh, RX: 145 mAh, case: 1950 mAh, and the operating time is up to 10 hours for the transmitter and 9 hours for the receiver, with the possibility of 3 full charges from the case. Charging takes about 1.5 hours for the transmitter and receiver and 2 hours for the case.