Overview:LED Type: Cree XP-E Q5 Function: Low-Med-High Finish: HA Type Ⅲ Reflector: Orange Reflector Lens: Anti-shattering ultra clear lens, anti-scratching & anti-slip Water & Dust Resistant to IP68 Switch: Head Twisty Switch Mil-spec: MIL-STD-810F Battery: 1 x AAA, 1 x Rechargeable Ni Mh AAA Due to the small body size, 10420 batteries are not recommended since it may cause the light becoming hot very quickly. Operation Insert the battery & tighten the tail cap. Tighten the head clockwise to turn on the headlamp. When the light is on, loosen (counter-clockwise) & tighten (clockwise) the head within 1 second will change the mode from low, medium to high level. Loosen the head to turn off the headlamp. Specification:52.5mm (L) x 16.2mm (D) x