The Motorola MH-66A4B is a genuine Submersible remote speaker microphone that is compatible with the Motorola EVX-534.
Once this microphone is connected to the radio in use the user will be able to send transmissions via the microphone and not the radio. This creates a quicker form of communication as the MH-66A4B can be clipped to the shirt or shoulder of the user. Rating IP57 on the ingress protection scale, this microphone can be submerged in water, up to 1.5 m for 30 minutes, and it will not become damaged. This microphone will endure all weather conditions and can be used in any work environment including power stations or mines as it is intrinsically safe.