Features: 1. The updated accessories are compatible with specialized headphones for FAST helmets, MICH helmets, and Peltor Comtac communication systems. 2. Tested compatibility allows Comtac I and Comtac II headphones to be attached to various FAST helmets using a mounting 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 installed, the earmuffs can rotate freely. Usage: 1. Remove the earmuffs from the original bracket on both sides. 2. Pull the headphone wire out from under the cover (break the retaining loop if present). 3. Attach the earmuffs to the mounting buckles provided (align properly and secure on both left and right sides). 4. Mount the assembly onto the helmet by inserting the buckles into the side grooves. 5. Route the headphone wiring along the top of the helmet and secure it with adhesive tape. Includes: 1 Pair x Headset Holder