A bright and versatile rear light that can be attached in a variety of ways.CatEye\'s compact Wearable Mini provides you with a quick and easy way to enhance your visibility, day or night.Powered by 1 x CR2032 battery (included)Up to 550 hrs run timeWeight: 12gMode memory functionLong press ON/OFF Mode: Output, Runtime Constant: 60 hrs Fast Flashing: 140 hrs Battery Saving Slow Flash: 550 hrs Supplied with: Clip, O-ring x 2 for seatpost/helmet mounting, magnet, CR2032 battery.