"Seeker 4 pro Vertical Holster & Seeker 4 pro Holster Retainer Bracket: The OLIGHT Seeker 4 Pro Vertical Holster features a vertical downward angled design that allows you to hang it on your back for hands-free lighting. The vertical holster can be used with the seeker 4 pro flashlight to achieve auto-unlock/lock capabilities and can be charged via Type-C We also include a holster retention bracket for the user to accommodate a variety of mounting situations (such as on the wall, in the car, etc.) How to install the holster fixing bracket: Peel off the 3M adhesive tape on the back of the fixing bracket and stick to any flat smooth wall or car panel. It is recommended to hang your holster + Seeker4pro host 24 hours after the holster retention bracket is installed, and the 3M adhesive increases strength. If the surface is not smooth enough, you can also use standard screws to fix it. "