Are you a slave to cycling? Do you fall in love with life on two wheels? This smart bike tail light is perfect for people who are passionate about cycling. When a brake is detected, it can automatically switch to the brake light mode, which increases attention from behind and enhances riding safety. It is very easy to install and compatible to seat posts or bike frames of any size. You can simply mount it on any child’s bike or adult’s bike by attaching to seat posts, handlebars, saddles and so much more. It is absolutely a MUST-HAVE on your cycling journey. Buy it now!