1. EASY INSTALLATION DESIGN: With a convenient one-touch dismount button, you just need to slide the light on & off the mount without removing the whole mounting bracket. The silicone mount strap for Taillight is designed with four openings that tightly fit around most handlebars and seat posts. 2. Fits all bikes:The bicycle rear light comes with mount. So it won't lose rubber bands like the taillights with rubber fixed. it attaches to virtually any bike frame, fork, seat post, handlebars or helmet, and can be easily disassembled in seconds without tools. It also can hook onto your belt, running gear, reflective vest, backpack, dog collars ,harnesses, or anywhere on your clothing. 3. WEATHER RESISTANT: Whether it's sunny or rainy,spring or autumn, bicycle taillights can withstand all kinds of weather effects. It allows you to ride ly at any time and anywhere.