Ocean one Walkie Talkie Marine Walkie Talkie Marine radio,portable Marine Radio,Marine Skull Microphone Suitable for Entel, Motorola, Marantz, ICOM, Ocean one brands such as radio II 2G Ex ia IIC T3 Ga Explosion Proof EU ATEX intrinsically safe certification Passed CE, FCC, RoHS certification IP67-rated waterproof and dustproof The bone conduction headset are compact, lightweight communications units designed for extreme hazardous environments. It is easy to use and helps you to fully release your hands and helps improve personal safety and productivity. A high-sensitivity vibrator is used to collect the vocal cord vibrations transmitted to the skull and convert the vibration signal into a sound signal. This skull earphone can be easily and securely installed in the helmet and does not affect the use of other protective equipment such as breathing masks.   Digital Remote Speaker Microphone use the latest digital signal processing (DSP) technology , which can filter out the impact sound and other environment noise . The noise is checked and digital processed before transferring . User can talk freely in up to 120dB noisy environment . The RSM can be used with a communication headset or be used alone , and the voice is clear . It is suitable for a variety of applications , including the flammable or explosive environment . The RSM has patented design of a large PTT button with speaker function . That makes it easy to press the PTT button . You can switch freely between manual mode and voice control mode , which can makes the communication more convenient .