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Your cart is empty.With over 60 years of diving experience and having sold almost every Full Face Mask (FFM) on the market, it was easy to see there was a need for something better. A common problem with most FFM, is the seal. The lack of a good seal causes the diver to use air quicker and can interfere with the divers ability to hear if using underwater communications. The Guardian as a Better Mask The Guardian was designed with a double seal, allowing for the comfort of both small and large faces. Equalizing system which helps fit virtually all noses. Variety of Colors are offered Low profile (visibility is superb) Hose comes off the right side (most preferred by divers) Easily adjustable head straps & robust buckles. Ambient Breathing Valve (ABV) Easily removable 2nd stage regulator (great for storage and maintenance) Buddy Phone Easy to install on any OTS Guardian Full Face Mask, this acoustic underwater telephone was originally designed for professional Search & Rescue Teams. Push to Talk System Squelch unit to descrease bubble and marine biological noise Uses ultrasonic upper single sideband for transmission Provides moderate range and clear diver-to-diver voice communication. RANGE: 150 to 1500 feet DEPTH: 130 Feet BATTERY TYPE: 9 volt(Not included) BATTERY LIFE: 8 to 10 hours