Tactical headset TAC-L IPSC Version Active Noise Cancellation Hearing Protection. Active Noise Reduction (ANR), Gel-Filled Ear Pads, Independent Volume Control, Padded Headband, No-microphone, battery not include. The built-in chip is upgraded to a digital signal chip, better performance, which can make your conversation communication more stable. The headset includes two frequency modes that provide the freedom to switch between indoor and outdoor noisy environments with different conditions, controlled by soft-touch digital buttons. Speech Enhancement looks for speech in background noise and actively filters the noise to improve speech intelligibility and make conversations more comfortable. Protect your ears at the shooting range or on the hunt with these electronic earmuffs; these earmuffs are guaranteed to provide maximum protection without making you feel loud enough to interfere with your gunstock. The new battery cover, with snap-on type battery cover, prevents accidental touch, easy to install the battery, and simple to operate. 2 AAA batteries or 1 123A battery can be used, and the 123A battery needs to be installed with the positive pole facing up and the negative electrode facing down. The smooth end facing down with the raised one facing up & Battery not included. If you want to replace the headband with a bracket, you need to lift the column up and rotate it again to get stuck, so that the wire that hooks the column can be removed, and then the bracket is stuck to the column and rotate the column to return to its original position. Note: This product does not contain batteries.