Main Features:● Applicable to any type of underwater lighting needs● Waterproof function allows you to use it when you are diving● High quality aluminum reflector cup makes effective range clearer● Q5 LED will give you stable and bright light, non-thermal radiation, safe and reliable● 90 degree rotating head allows you to illuminate at any angle● Adjustable elastic band, easy to wear on the head directly● Magnetic control switch is very sensitive, convenience to use● With the soft pad, you will feel comfortable when you wear it● Three lighting modes ( low brightness, high brightness, strobe ) are suitable for different occasions● Extra long shooting function, lighting range is about 200 - 500M● Waterproof up to 30M level● Powered by 1 x 18650 battery ( not included ) or 3 x AAA battery ( not included )Information:● Voltage: 3.7V● Light source: Q5 LED● Lumen: 500LM● Waterproof standard: IP65 Battery Type: AAA,Lithium Ion Body Color: Yellow Emitting color: Cold White,Warm White Light Source: LED Model of LED Beads: Q5 Switch Mode: High/Low,Strobe Waterproof: Yes Wattage: 5W Package weight: 0.218 kg Package Size(L x W x H): 15.00 x 10.00 x 8.00 cm / 5.91 x 3.94 x 3.15 inches Package Contents: 1 x Q5 5W 500LM 3-level LED Headlight, 2 x Battery Holder, 2 x Waterproof Ring IPXX Rating ChartIP Code The IP Code (or International Protection Rating, sometimes also interpreted as Ingress Protection Rating*) consists of the letters IP followed by two digits and an optional letter. As defined in international standard IEC 60529, it classifies the degrees of protection provided against the intrusion of solid objects (including body parts like hands and fingers), dust, accidental contact, and water in electrical enclosures. The standard aims to provide users more detailed information than vague marketing terms such as waterproof.The digits (characteristic numerals) indicate conformity with the conditions summarized in the tables below. For example, an electrical socket rated IP22 is protected against insertion of fingers and will not be damaged or become unsafe during a specified test in which it is exposed to vertically or nearly vertically dripping water. IP22 or 2X are typical minimum requirements for the design of electrical accessories for indoor use.