NECARL Tactical Comta Ⅱ Headset with Microphone, Sound Amplification Noise Canceling Ear Protection Headphones Earmuffs

["The ComTac tactical headset is an active-volume hearing protector, active noise canceling and sound amplification. Only compatible with Civilian Wiring 7.0 PTT, not for military wiring PTT. Please NOTE: not included PTT and walkie talkie","Dual ear-cup microphones, wearers can hear ambient sounds 360 degrees along with the capability to suppress other high impact noises. The earmuffs are made of sponge, comfortable, soft and snug","Excellent sound quality with perfect location hearing, up to 4 times amplification, suppress harmful noises above 82 dB. Adapt better with tactical environment requirements","Extensible and detachable earphone bracket. When disassembling, be sure to ensure that the bracket and earmuffs are in a 90-degree vertical state, otherwise it will break","Use 2* AA batteries (Not include batteries). Press the\"+\" \"-\" volume key at the same time to turn on or off the earphone, sometimes there may be poor contact, so you need to press it several times"]