Designed to directly replace sunshades on the Caldwell Ballistic Precision Chronograph. The Light Kit allows for the chronograph to be used indoors with lights on our outdoors with lights turned off. The kit can run on AA batteries or 110 or 220 wall outlet with the included adapter for 100 or 220v plugs. There are 16 bright white LEDS per shade to make sure you'll have the proper light in nearly all lighting conditions.