ITEM NAME:Rail Adapter Attachment Kit for MICH FAST Rails Adapter Set Tan Description: It can be connected to special headphones for a full range of FAST helmets, MICH helmets, and walkie-talkie. After using the buckle, earmuffs for walkie-talkie headphones will be separated from the curved headband, directly clip to the buckle, and the buckle can be fixed in the groove on the both sides of the earphone , after installation, earmuffs for headphones are free to rotate. Usage: 1.take off the earmuffs from bracket on the both sides 2. take out the wire on the earphone from cover (must break hoop package) 3. clip the earmuffs on the hanging buckle of the product (align the location, and clip it at both left and right ) 4. Install it on the helmet 5. swirl the wiring of the earphone on the top of the helmet, and fix it with adhesive tape. Specification: Material: Plastic Length: approx.13.5cm/5.3inch Diameter: approx.4cm/1.6inch Package Includes: 1 Pair of Rail Adapter SKU: DMO0016843865009690.1 Pair of Rail Adapter. take off the earmuffs from bracket on the both sides. clip the earmuffs on the hanging buckle of the product (align the location, and clip it at both left and right ). After using the buckle, earmuffs for walkie-talkie headphones will be separated from the curved headband, directly clip to the buckle, and the buckle can be fixed in the groove on the both sides of the earphone, after installation, earmuffs for headphones are free to rotate.