Specification - Brand: Acetech - Material: Aluminum And Steel - Color: Black - Package Includes: 1x Tracer Unit, 1x Flash Hider Features - Made From Aluminum Steel And Polymer - Steel CCW 14mm Negative Threading QQ Flash Hider Included - Uses 4 AAA Batteries And Lasting Up To 20,000 Rounds - Can Sustain Tracer Affect Up To 1800 Rpm - Auto Powers Off To Conserve Battery Usage