Specs: input: AC100-240V 50/60HZ; output : DC4.2V +/- 0.2V DC600mA Suitable for camping， outdoor lighting， and other task which needs strong lighting. There are 3 switch modes: strong light， weak light and strobe (for SOS). Slightly press to switch mode. Max 300 lumens， the light can reach over 150 meters. Durable and low power consumption / Water-proof ， Very high quality aluminum alloy casing and good quality， you won't be disappointed. Size: Length: 4.9inches (15.5cm) . Diameter: 3.5cm Operated by 1 x 18650 rechargeable battery (not included) There is a charging jack on the body of the flashlight， you can charge battery when it is inside the torch，