With DQPSK digital modulation, this microphone delivers a frequency response of 50Hz to 20kHz and a SNR of up to 90dBA for outstanding sound quality. It operates flawlessly in sunlight excellent immunity to RF interferences from HF-driven lighting. It features adjustable settings of microphone channel and sensitivity. The built-in rechargeable battery lasts up to six hours, and the convenient USB charging port ensures hassle-free use, making it an ideal solution for modern educational environments.