Product Description,1.water-resistance,instant zooming, 3 X alkaline AAA batteries(GP) 2.Voltage: 4.5V; 3.Working current: 350 mA 4.Working time: 3 hours continuing 5.LED mode: 1W CREE P4; 6.LED lifetime: 100,000 hours 7.Illuminance: 80-110for P4; 8.Switch: Self-locking function.SpecificationsAppearance size:L104.3mm*Φ34.6mm Weight: 135g (with battery)