Features: 1. The new version accessories can be connected to special headphones for a full range of FAST helmets, MICH helmets and Peltor Comtac walkie-talkies. 2. Through testing, headphones for Comtac I, Comtac II can be connected to the full range of FAST helmets using the hanging buckle. 3. After using the buckle, the earmuffs for Comtac walkie-talkie headphones will be separated from the curved headband, directly clamped on the buckle, and the buckle can be fixed in the groove 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 cord of the headphone from the casing (need to break the jumper package). 3. Clip the earmuffs onto the product's hanging buckle (align the location and clip it on both left and right). 4. Install it on the helmet. 5. Wind the headphone wiring on top of the helmet and fix it with tape. Includes: 1 pair x headphone holder