The X400 Ultra (RED) is a compact Weaponlight for pistols and long guns featuring an ultra-high-output white-light LED and a high-visibility red laser sight. Its recoil-proof LED and special TIR lens create a versatile, 500-lumen tactical beam with extended reach, enough surround light to accommodate peripheral vision, and more than enough output to temporarily overwhelm the dark-adapted vision of an aggressor. X400 ultra's five-milliwatt red laser sight is highly visible to the human eye and, once zeroed, rarely needs re-zeroing thanks to Nylok(TM) adjustment screws that won't back out from the effects of recoil. The light securely and rapidly attaches to either Universal Mfg: Surefire SPECS: White-Light Max Output: 500 Lumens, White-Light Tactical Runtime: 1.5 hours, Red Laser Output: 5 mW/635 nm, Red Laser Runtime: 8 Hours, Bezel Diameter: 1.13" (2.8cm), Length: 3.9" (9.9cm), Weight: 4.9 oz. (139 g), Switching: Ambidextrous Push/Toggle, Material: Aerospace Aluminum,