Cateye Wearable Mini. A convenient rear light with a RED LED that is ideal for urban commuters with a versatile mounting system Mounting. Cateye’s Wearable Mini rear safety light comes with an integrated mounting strap. The rubber band mount fits 26.0-31 8mm with a longer version also included for use on helmets. The mount can be used to connect the light to your seat post, or your clothing, bag, etc Battery. The rear light is powered by the easily replaceable CR2032 battery that provides up to 550 hours of power Light Modes. The light comes with three different light modes easily swapped between to suit your current lighting conditions and depleting battery life Mode One (Constant): 60 hours battery lifeMode Two (Slow Flashing): 550 hours battery lifeMode Three (Rapid Flashing): 140 hours battery lifeFeatures. Compact and low-profile designIntegrated clip-on bracketAlso comes with rubber strap mountPowered by a CR2032 battery3 different light modesLight mode memoryWeighs 12gDimensions: 39 x 33 x 17mmBuy Cateye Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.