When not in use, the weight of the batteries compresses the spring and shuts off the contact between wire and batteries' negative terminal. When the light is thrown into the water, it floats in vertical position immediately, thanks to its specific shape. The batteries slide down in the tube and, with their weight, create the contact with the wire connected to the bulb.

• Candlepower: 4 
• Illumination 2 hours under full battery
• 360° arc of visibility.
• Optimum visibility: 10 cm free-board above the waterline.
• Designed to float upright, which causes activation.
• Uses five D (R20) batteries, not included 
• Includes mounting bracket to secure the light, horizontally or vertically. 

Images may differ from actual product.