Built in active noise reduction function, users can hear the ambient sound. Harmful pulse noise can be immediately reduced. Voice menu and adjustment button are provided to control the sound level of active noise reduction restoration, balancer, adjustable restoration time, equalizer, adjustable external input volume and external input mode. The battery life is about 1000 hours. The earmuff will send out a low battery warning signal before the low battery automatic shutdown.

Personal protective equipment to protect people's hearing from strong noise damage. If it is technically or economically difficult to take noise reduction measures, the use of ear protectors is the most economical and effective way.