EX 328 BDAL-EMKII Multi function, dual beam, IR/Daytime visible Integrated with LED Flashlight and IR illuminator Button & Wire Remote Control Switch works with Selector Switch Fits for standard 20mm Rail You can install EX 201 MRDS on it (EX 201 not included) Powered by 1*CR123A(3.0V) or 1*16340(3.7V) (not included) Batteries Color: BK