The ACR C-Strobe LED Auto H2O PFD Light, model 3964.1, is a must - have for low - light emergencies. It has three useful modes: Strobe, Steady - On, and SOS. With a 45 - lumen white LED, it offers an extensive continuous operating life of over 120 hours in strobe mode at 30°C. It's waterproof, having been tested for 24 hours at 3.3 ft (1m). The water activation sensors automatically turn it on when it touches water, and it also has a manual On/Off button. Its impact - resistant case can withstand tough conditions. It uses two AA 1.5V batteries (not included) and is USCG/SOLAS, CE, and Transport Canada approved. Ideal for life jackets, camping, biking, and more, its slim and lightweight design easily fits in a pocket or attaches to a life jacket or backpack. The flexible lashing loops and Velcro strap provide multiple mounting options, and it comes with a clip for your inflatable life jacket's oral inflation tube. UPC: 791659396414.

Using your ACR C - Strobe LED Auto H2O PFD Light is easy. You can either manually turn it on or off with the On/Off button, or set it to the armed position so it activates automatically when it hits the water. To change modes, just use the button. When using it, make sure the batteries are inserted correctly. Use two AA 1.5V batteries, but remember they're sold separately. After using it in water, dry it thoroughly to keep it working well. Store it in a cool, dry place. Don't expose it to extreme temperatures or impacts. Regularly check the case for any damage, and replace the batteries if the light gets dim. Enjoy your outdoor activities with this reliable light!