FEATURES-TEN-TAPA(R) Programming-choice of 3 operating modes-High for max illumination: 1000 lumens-Low for extended run time: 65 lumens-Strobe for signaling-Dual fuel - uses two CR123A lithium batteries (included) or accepts one Streamlight rechargeable 18650 lithium ion battery-Remote pressure switch features momentary and "constant on" operation-Fixed rail grabber with thumbscrew easily attaches to picatinny rails-Includes remote pressure switch, push-button tail switch, remote retaining clips, double- sided tape and zip ties-Durable, anodized aluminum construction-IPX4 water-resistantPRODUCT SPECIFICATIONS:Dimension 2.70 X 4.10 X 8.10Height 2.7000Width 4.1000Length 8.1000AR-15 ACCESSORY YBODY MATERIAL AIRCRAFT GRADEMAJOR COLOR BLACKLENGTH IN INCHES 4.25WEIGHT IN OZ 4.5OTHER FEATURES: COMPACT ALUMINUM BODY, WHITE LED, INCLUDES 2-CR123A LITHIUM BATTERY 1000 LUMEN LIGHTT REMOTE PRESSURE SWITCH TEN-TAP PROGRAMMING FIXED RAIL GRABBER WITH THUMB SCREW ATTACHES TO PICANTINNY RAIL