The Opsmen F101 helmet marker attaches to helmets with Velcro on the underside. It runs on a CR123A battery, which is included, and features steady green light, steady green light with a flashing white light, and infrared (IR) illumination.
- Power: CR123A battery
- Included: CR123A battery
- Lighting modes: Steady green, steady green with flashing white light, infrared (IR)
- Attachment: Velcro underside for helmets