3 Gears, K18MAX 18xT6, Luminous Flux: 5400lm LED Flashlight, Without Battery (Black) 1. Lens material: optical lens 2. Working gear: strong light-weak light-long press the switch to enter the flash, 3 gears 3. Product size: 137x59x51mm 4. Applicable battery: 18650x4 5. Waterproof rating: IPX4 (lifestyle, do not soak in water) 6. Charging method: micro USB direct charging + power output function 7. Lumens: 5400 lumens (actually 2500LM) 8. Product power: 54W 9. Working voltage: 3.7-5V 10. Product material: aluminum alloy 11. Product color: black body + silver head 12. Whether to focus: no focus, lamp cup type 13. Switch position: middle button switch 14. Power display: the green light has power, the red light is insufficient; the red light flashes and needs to be charged, the green light is always on when it is full. 14. Product net weight: 320g (single flashlight) 15. Product gross weight: 370g (single flashlight + USB cable + white box) Features: USB direct charge charging, with power display, with output charging function, which can be output to charge various digital products. 1: Lamp beads, using 18 T6 lamps, lumens up to about 5400LM, lamp life about 100,000 hours. 2: Flat lens, good light transmission, aluminum head protection mirror is not easy to be scratched, aluminum light cup, uniform reflection light, large irradiation area. 3: 4 18650 batteries can be used, which can be removed and replaced at any time, and batteries of different capacities can be replaced according to personal needs 4: Battery contact, battery spring contact design, with good electrical conductivity, effectively preventing poor contact.