Walkie-talkie headsets combine advanced surround sound listening electronics with new thin-line contour earmuff designs. The Comtac II headset dual handset microphone provides the wearer with a 360-degree ambient sound. The earmuff microphone provides audiovisual capabilities. 1 AA battery per earmuff (not included). The headband is made of a first layer of cowhide that is not easily deformed and fragile. Sponge earmuffs – comfortable sponges, high quality sponges, long-wearing will not squeeze the ears, but also have a good noise reduction effect. Chip Protection – The chip of this headset is well protected by a thin film, which will result in higher defenses and is resistant to mildew, dust and moisture. 1 COMTAC II tactical headset 2 battery cover.