feature: It is suitable for FAST series helmets, ACH series helmets, MICH helmets and Comtac headsets. After installation, the Comtac earmuffs can rotate freely. The length of the bracket can be adjusted. Suitable for COMTAC I II III IV tactical headset usage: 1. Remove the earmuffs on both sides of the headset from the stand 2. Take out the headphone cable 3. Fasten the earmuffs on the buckle of this slide rail adapter (the corresponding position, left and right sides) 4. Mount it on the helmet 5. Connect the headset to the top of the helmet according to your own situation, and then fix it on the top of the helmet specification: Product color: sand/black Wearing method: head wear Headphone type: earphone Quantity: 2 (a pair) package 1 pair of tactical headset ARC rail adapter Note: The stand does not include headphones