The USB-558XL USB Rechargeable Tactical Flashlight uses an LED rated at 900 lumens on high for 2 hours but can be extended up to 16.75 hours in low mode (100 lumens). At only 5.9 inches long and weighing only 5.7 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. The USB-558XL 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. LED technology Momentary or constant-on flashlight Sharp focused beam 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 Specifications Xtreme Lumens: Yes Multi-Function: Yes Flashlight Lumens: 900 / 350 / 100 Beam Distance: 215 m / 129 m / 56 m Candela: 11,524 / 4,133 / 1,040 Drop Rating: 2 m Dust/Water Rating: IP-X7 Waterproof Flashlight Runtime: 2 / 4.25 / 16.75 Charge Time: 4 Switch Function: Single Tail Switch - Momentary or Constant-on Flashlight, High, Medium and Low-Brightness Flashlight, Strobe Length: 5.9 in (150 mm) Weight: 5.7 oz (162 g) Handle Diameter: 1 in (25 mm) Head Diameter: 1.2 in (30 mm) Light Source: LED Case Material: Aircraft Grade 6061-T6 Aluminum w/Type III Anodized Finish Cord Length: 2 feet Cord Color: Black Body Color: Black Quantity of Batteries: 1 Power Source: Rechargeable Lithium-ion Battery (included) Backup Power Source: 2 CR123 batteries (not included) Package Contents: Light, Lithium-ion Rechargeable Battery, USB Cable, CR123 Battery Carrier Warranty: Limited Lifetime