Features: 1. The updated accessories are compatible with special headphones for FAST helmets, MICH helmets, and Peltor Comtac communication devices. 2. Tested compatibility shows that Comtac I and Comtac II headphones can be attached to various FAST helmet models using a hanging buckle. 3. After installation, the earmuffs from Comtac communication headphones detach from the original headband and securely clip onto the buckle, which fits into grooves on both sides of the helmet. Once mounted, the earmuffs allow 360-degree rotation. Usage: 1. Remove the earmuffs from the original bracket on both sides. 2. Pull the headphone wire out from under the cover (breaking the retaining loop is required). 3. Attach the earmuffs to the hanging buckle provided (ensure proper alignment and secure on both left and right sides). 4. Mount the assembly onto the helmet by inserting the buckle into the side grooves. 5. Route the headphone cable over the top of the helmet and secure it with included tape. Includes: 1 Pair x Headset Holder