The USB-578XL USB Dual-Light(TM) Tactical Flashlight uses an LED rated at 900 lumens on high for 3 hours but can be extended up to 22 hours in low mode (150 lumens). At only 5.8 inches long and weighing only 6.9 oz, this metal tactical flashlight is multi-functional, cycling between high, medium, and low modes with an optional strobe when you press twice in succession on the upper tail-cap switch. The secondary switch located below provides 250 lumens for 3.5 hours. Press both buttons independently to go into exclusive dual-light mode at 500 lumens for 2.5 hours which is ideal to light up your downward facing proximity and at a distance for maximum illumination. The USB-578XL is rated IP-X7 waterproof and features a discretely sleeved collar that opens for direct USB charging. The built-in charging indicator turns from red to green when fully charged. Included is a 2 foot USB charging cable, lithium-ion rechargeable battery and CR123 battery carrier (batteries not included) for added convenience. Features LED technology Momentary or constant-on flashlight with H/M/L/Strobe modes Independent downward facing floodlight Dual-Light(TM) design for maximum illumination Aircraft-grade 6061-T6 aluminum housing with Type III hard anodized finish IP-X7 Waterproof Chemical, heat and impact resistant Meets the requirements for NFPA-1971-8.6 (2013) USB cord with rechargeable lithium-ion battery (included) Can also run on 2 CR123 batteries (not included) Serialized for personal identification Low Battery Indicator Removable snap-on pocket clip Limited Lifetime Warranty Specifications UPC: 017398807128 Xtreme Lumens: Yes Dual-Light: Yes Multi-Function: Yes Flashlight Lumens: 900 / 350 / 150 Floodlight Lumens: 250 Dual-Light Lumens: 500 Beam Distance: 196 m / 132 m / 79 m Candela: 9,644 / 4,350 / 1,578 Drop Rating: 2 m Dust/Water Rating: IP-X7 Waterproof Flashlight Runtime: 3 / 6 / 22 Floodlight Runtime: 3.5 Dual-Light Runtime: 2.5 Floodlight Color: White Type of Floodlight: Solid Switch Function: Upper Tail Switch - Momentary or Constant-on Flashlight with High/Medium/Low/Strobe modes. Lower Tail Switch - Floodlight. Dual-Light Length: 5.8 in (147 mm) Weight: 6.9 oz (196 g) Handle Diameter: 1.03 in (26 mm) Head Diameter: 1.29 in (33 mm) Light Source: LED Case Material: Aircraft-grade 6061-T6 Aluminum w/Type III Hard Anodized Finish Cord Length: 2 ft Cord Color: Black Body Color: Black Quantity of Batteries: 1 Power Source: Rechargeable Lithium-ion Battery Backup Power Source: 2 CR123 (not included) Package Contents: Light, Lithium-ion Rechargeable Battery, Removable Snap-On Pocket Clip, USB Cable, CR123 Battery Carrier Warranty: Limited Lifetime