Chrony LED Lamps (C.L.L.) Works with all Shooting Chrony chronographs Front and rear lamp assemblies Use indoors & outdoors For any lighting condition 14" long when assembled Incl. front & rear lamp assemblies, diffusers, 16" wire rods, 120V/220V AC adapter (12V DC output @ 500MAH) Never get wrong velocities again! The Shooting Chrony LED lamp will shine the right light on any Shooting Chrony chronograph and give correct velocity readouts at dawn or dusk, with overcast skies as well as indoors. The Chrony LED Lamp quickly attaches to the skyscreens of any Shooting Chrony. No tools required.