M300 Tactical Headset Noise-canceling Electronic Shooting Earmuffs for Airsoft. Hearing Protection, No Microphone. The built-in chip is upgraded to a DSP digital signal chip for better performance and can provide a better experience. 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. 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. Made of high-quality silicone earcups, the silicone earcups are more comfortable than traditional sponge earcups, and they fit snugly in your ears to enhance the noise reduction effect. The headband system is upgraded, and the headband is secured with a screw lock, making it easy to load and unload. Replacement adapter accessories are also available. Note: Batteries are not included in this product.