Abstract: The present disclosure provides a communication device for a hearing protection equipment which includes at least one earmuff, at least one loudspeaker and an audio input member, the device includes: a housing; a first mounting assembly rotatably arranged on the housing; a second mounting assembly arranged on the housing, the first mounting assembly and the second mounting assembly are releasably connected to two ends of the earmuff respectively; a microphone configured for capturing an audio; a radio transceiver configured for wirelessly transmitting the audio captured by the microphone to user and wirelessly receiving a wireless signal containing an audio from the user; and an audio output member communicated with the audio input member and configured for transmitting the wireless signal containing the audio to the at least one loudspeaker. The present disclosure further provides a system for connecting the communication device to the hearing protection equipment.