Features: 1. The new version of accessories can be connected to special headphones for a full range of FAST helmets, MICH helmets, and Peltor Comtac walkie-talkies. 2. Through testing, Comtac I, Comtac II headphones can be connected to the full range of FAST helmets with hanging buckle. 3. After using the buckle, the earmuffs for Comtac walkie-talkie headphones will be separated from the curved headband, directly attached to the buckle, and the buckle can be fixed in the slot on both sides of the helmet. After installation, the earmuffs for Comtac headphones can rotate freely. Usage: 1. Remove the earmuffs from the bracket on both sides 2. Take out the headphone cord from the casing, you need to break the jumper package 3. Attach the earmuffs to the product's hanging buckle, align the position and attach it to both left and right sides 4. Install it on the helmet 5. Rotate the headphone cords on top of the helmet and fix it with tape. Package list: 1 pair x headphone holder