ACR Product: 3355 C-LightÖ w/ C-Clip Life Preserver Emergency Signaling Light. Designed to meet the demands of sea, ideal for car, boat crew, campers, crisis or whenever a reliable efficient light is needed. Slim lightweight design fits easily in a pocket, hangs discreetly when attached to life vest or jacket. Attaches easily to life vest or jacket with stainless steel pin or integral lash loops and Velcro strap. Waterproof and corrosion resistant case. New attachment pin engages top cap; prevents accidental disassembly. Twist ON/OFF control can be operated by gloved hands and in adverse conditions. Adjustable wrist strap provides a means for keeping light secure. Intense incandescent light visible for up to two miles depending upon conditions; produces twinkling effect for signalling. Lens simultaneously focuses a beam of light straight ahead and a ring of light all around. Multi-faceted refracting lens intensifies light up to 20 times brighter at the horizon and 75 times at the vertical cone of light. Size: 5.6 x 1.3 in (14.3 x 3.2 cm) Weight: 1.3 oz (37 g) without batteries.