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-talkie. 2. Through testing, Comtac I, Comtac II headphones can be connected to the full range of FAST helmets by hanging buckle. 3. After using the buckle, earmuffs for Comtac walkie-talkie headphones will be separated from the curved headband, directly clipped on the buckle, and the buckle can be fixed in the groove on both sides of the helmet, after installation, earmuffs for Comtac headphones are free to rotate. Usage: 1. Take off the earmuffs from the bracket on both sides 2. Take out the cable of the headphone from the cover (need to break the loop package) 3. Clip the earmuffs on the hanging buckle of the product (adjust the location and clip it on both left and right) 4. Install it on the helmet 5. Twine the cable of the headphone on the top of the helmet, and fix it with tape Includes: 1 Pair x Headphone Holder