Features: 1. The new version of the accessory can be connected to special headphones Compatible with a full range of FAST helmets, MICH helmets, and Peltor Comtac walkie-talkies. 2. Through testing, headphones Compatible with Comtac I and Comtac II can be connected to the entire series of FAST helmets with suspension buckle. 3. After the buckle is used, the hearing protection Compatible with Comtac walkie-talkie headphones will be separated from the curved headband, directly attached to the buckle, and the buckle can be attached to the groove on both sides of the helmet. After installation, the hearing protection Compatible with Comtac headphones can rotate freely. Usage: 1. Remove the earmuffs from the bracket on both sides 2. Take the headphone cord out of the cover, break Compatible with the packing with the arc 3. Attach the earmuffs to the product's suspension buckle, adjust the position and attach them both left and right 4. Mount them on the helmet 5. Turn the headphone cords on top of the helmet and secure them with tape. Packing list: 1 pair x Headphone holder