Features: 1. The new version of the accessory can be connected to special headphones Compatible with a complete series 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 buckles. 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 slot 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 out the headphone cord from the cover, break Compatible with the packaging with the arc 3. Attach the earmuffs to the product's suspension buckle, adjust the position, and fasten them both left and right 4. Install them on the helmet 5. Twist the headphone cords on top of the helmet and secure them with tape. Packing list: 1 pair x Headphone holder