SureFire ST04 Remote Tape Switch Pad for WeaponLight Provides remote momentary-on WeaponLight activation Tape switch attaches with adhesive-backed Velcro Unit is O-ring sealed, weatherproof Four-inch cable length fits most rifle/carbine applications Fits-Millennium Universal, Classic Universal, Scout Light with socketed tailcap and X200, X300 and X400 with XT tailcap