Features: Each LED light includes 5pcs SMD LED on the PCBA board, bright. 3 different colors for different purposes, 3 lighting Modes [Steady, Flash, and Strobe] It's suitable for outdoor use, it is widely used for different boats, pontoon, kayak, bike, dog collar, stroller, runner, etc [Warning: it couldn't be soaked in water] The LED light's back is with a clip, which could easily attach to a flat belt.With these extra elastic straps, you can easily fix the lights around poles or tubes, on a bike for night cycling, on your hand or leg for night running. Specification: Colour:Red,Green Material:PC+Plastic Size:5.5 x 3 x 1.8 cm/2.17x1.18x0.71 inch Package Contents: 2Pcs* Lights 2Pcs* Buckle straps 2Pcs* Screwdrivers