NRR:22dB, Equipped with an advanced chip(Civilian Version), the Tactical Headset’s Automatic Noise Cancellation actively reduces transient harmful noise above 82 decibels to protect the user’s hearing. Ideal for tactical games, airsoft sports, shooting games, or anyone who needs to communicate in a noisy setting. Headband Style: Removable rear headgear with Velcro adjustable buckle, easy to adjust, better fit to the head, more convenient to wear hats and tactical helmets. Is turned on, the ear guards will automatically supplement the ambient sounds (such as footsteps) instead of completely isolating all external sounds. Airsoft headset is made of high quality soft sound-isolating gel ear cushions with good sound-isolating effect, which provides a good communication environment and reduces the discomfort caused by prolonged use. Note: Batteries are not included with this product.