Hearingsport TAC-201 ARC Rail Helmet Dual Purpose Mount, Hearing Protection Tactical Headset + 2-PIN RAC PTT. Active Noise Reduction (ANR), Ambient Sound Enhancement. Gel-Filled Ear Pads, Battery not included. And can be better used in shooting games and other scenarios, bringing a better experience. Size adjustable and comfortable to wear. Redesigned earmuffs for clear sound and comfortable wearing. Amplification up to 4 times, can be used as a wiretap to listen to the whispers of your enemies like a spy. Powered by 2 AAA batteries (batteries not included). Noise canceling: Noise canceling system activates when ambient noise reaches 80 dB. The ear cushions are filled with silicone, which can bring a more comfortable wearing experience and fit your ears better than sponge ear cushions. Snap-on battery cover, installing the battery is simpler and firmer, and the battery cover will not be exposed when the battery cover is opened due to accidental touch. This product comes with a stand that is compatible with most helmets with ARC rail. This bracket can be mounted in two positions on the rails, so you can choose the position to install it according to your preference. The ARC rail is compatible with this series of helmet rails, most Ops-Core FAST helmets, ACH helmets, and MICH helmets. 9.360°Free Rotation: The rail bracket can be fixed on the top rail of the helmet and both sides of the helmet rail, and the telescopic rod in the center can be freely adjusted within 360°. Note: This product does not include batteries and helmets.