C4® LED technology gives this compact pen light an extremely bright, clear beam. Anodized aircraft aluminum case is shock- and corrosion-resistant. All openings have O-ring seals for water resistance. Pen light passes 1-meter drop test. Push-button tail switch. Removable pocket/hat clip offers hands-free operation and portability. Battery Type: Alkaline; Flashlights Type: Penlight; Power Source(s): 1 AAA (Included); Bulb Type: LED.