The Knog Plug Rear Light is for every rider looking for a bright, easy to attach light, with incredible visibility from a range of angles.Versatile, easy to use light with 5 modes: Max, Medium, Pulse, Flash & Eco-FlashUSB rechargeable Lithium Polymer battery provides up to 100 hours of run time in Eco-Flash modeSingle LED provides a powerful beam, while domed rear lens improves side visibilityDurable design is 100% waterproof against the elementsThree interchangeable straps for different handlebar shapesThe Plug Rear Light uses an overmolded TPU construction and is packed with technology, such as the domed rear lens for improved side visibility. Even with all of the light being dispersed by the Plug, riders don’t need to sweat the battery life – with up to 100+ hours run-time on eco-flash mode. Designed to work with all genres of bicycles from commuters to aero road bikes, the Plug comes with three different silicone bands for securing it to seat stays, and of course, seatposts. It even works with awkward aero seat posts too. If you want a versatile, easy to use rear light, the Knog Plug is a great choice!