Bright flashlight and powerful integrated laser. It has a built in on/off switch It is designed to mount on any standard weaver rail on pistol or rifle.

Also works with Umarex T4E Walther PPQ, Umarex T4E TPM1 Glock, Umarex T4E Smith and Wesson M&P, Umarex T4E HDP Home Defense Pistol 
Uses 3V Lithium Batteries CR123 CR123A, DL123, 123, EL123, CR17345
Note:  Positive terminal end goes toward spring.

*Battery is not included