The HUOHOU NexTool Head Lamp blue set NE20005 is equipped with a 500mAh lithium battery, supports charging from an external battery. The maximum operating time of the flashlight at full power is 17 hours. It is so lightweight that it is barely felt on the head. The ultra-light flashlight weighs 27 grams, and with the strap it will weigh only 42 grams. It is indispensable for travel and outdoor activities. The flashlight strap is made of cotton, it is not only comfortable, but also absorbs moisture well. The size of the strap can be easily adjusted, so the flashlight will fit everyone. The flashlight has a wide angle of illumination. It is protected by IP45 rating. Sudden rain or accidental water exposure will not affect the normal operation of the flashlight.