Product model: T139+COB [Product bulb]: P160 (theoretical life: 100,000 hours) [Switch type]: press on the switch on the lamp head [Working equipment]: main light P160 strong light, low light, flashing, - auxiliary light is always on (auxiliary light can be adjusted from high bottom) [Lighting color]: white light on the lamp head, red light warning light on the back of the battery compartment [Waterproof grade]: IPX5 (rain-proof, splash-proof water) Operating voltage: 3.7V [product material] : aluminum alloy + ABS [Charging method]: micro USB charging, support power output [Zoom mode]: telescopic zoom of the head Surface treatment: Wear-resistant anodizing [Product gross weight]: 349 G (headlight + USB cable + color case) Product selling point: Machining center engraving process, segmented current, easy heat dissipation Large lens, large aperture, wide lighting range The input and output function of the battery compartment can be used as a mobile power bank.The battery compartment has a display of power, 4 LED indicators and each LED has a meter with 25% power. The headlight belt added a non-slip belt, non-slip and comfortable, and no pressure. < /p> Reminder: this model has current protection. If the battery power is too low, it will automatically turn off to protect the battery from being too low and unable to charge. At this time, it can be charged in time, and 3 18650 batteries need to be used for power supply at the same time. (Note: Please use 3-pronged batteries, flat batteries cannot be used and cannot be touched)