This is a Surefire Remote Switch known as the UE07, model UE07.
The UE07 provides reliable remote activation for any Scout Light Weapon Light. Tail cap module screws onto Scout Light body. Switch" cable" and connector are an integral unit that plugs into the tail cap socket; other cable lengths are available (see ST-series switches). Pressure-activated switch attaches to firearm via adhesive-backed Velcro(R) pad. UE07 features 7 inch cable" which fits most rifle/carbine applications. Entire unit is O-ring sealed at both ends" weatherproof. Fits: SureFire Scout Light Weapon Lights
Features:
Tape switch attaches with adhesive-backed Velcro®
7 cable is standard;other cable lengths available;O-ring sealed, weatherproof
