Proviz Flashers are a fantastic way to keep you safe when out on the roads at night. Their bright electric blue or red flashing colours help you to be seen and draws attention to your position on the road or pavement. Proviz Flashers are easily attached to your clothing through the rip-and-stick fastener and can also easily be attached to bags, baby prams, bike saddles, rucksacks etc using the elastic cord provided which can easily loop through itself. The flashers are also compatible with the Classic Yellow & Pink Running X-Vests where there is a velcro patch sewn on for its attachment Flash/Constant/Off | Bright LED | Easily replaceable CR2032 battery | 100 hour battery life | Compatible with the Classic Yellow & Pink Running X-Vest | Colour: Red, Blue