Aqua Signal LED Portable Bi-Color Navigation Light Kit Designed for safe navigating at night on small watercraft, dinghy, canoe, row boat, kayak, etc that are manually powered or less than 23' with speeds up to 7 knots Lights are compact, only 5 1/2" length, requires 4 AAA batteries not included For safe navigating at night Flexible mounting options, c-clamp and suction mount with 4.5 " flexible arm and special adapter for adhering to irregular surfaces Housing incorporates carabineer clip to allow for attaching to boat with a lanyard to prevent loss overboard