WHY CHOOSE OUR LIGHTS? Compared to other clip-on battery-operating navigation lights, our lights are much brighter, and more water resistant. What's more, the benefit from the rechargeable function, you don't need to change to batteries, which saves you time and money. Question: I get the lights but they can not be turned on, what can I do? Answer: Because the battery has not been used for a long time, some of the lights will automatically turn on the power-off protection. Don’t worry, it can be activated by charging it for 1 minute. IMPORTANT NOTE: To improve the waterproofing of these lights, please tape the charging port with electrical tape before using it. SPECIFICATION: Each LED Light size: 27.6 x 7.5 x 7 inch Color: Red, Green Long LED Lifespan: 10,000 Hours. Lighting Modes: Full Brightness / Chase Mode / Quick Chase Mode / Flashlight Mode. Battery Life: 4hrs (full brightness), 8hrs (half brightness), 9hrs (slow flashing),10hrs (fast flashing). APPLICATION: The best idea for boat or kayak navigation lights, bow lights, stern lights, and emergency lights. These lights can make your boat or kayak legal and safe at night, perfect for those who want to fish or go out by boat or kayak at night. FIT FOR: The flexible silicone mount strap and removable mount base make it a breeze to install on Kayak, Canoe, Dinghy, Paddle Board, Pontoon Boat, Bass Boat, Jon Boat, Dinghy, Jet Ski, and so on.