Rear light, LED. It features three red LEDs. Waterproof. Mounting bracket that fits all seat post diameters. Color: Black. Power source: Battery-operated. Light duration: 80 hours. When you are cycling, having a light is essential. With the RL403R rear light, you are well-equipped. Especially during the dark season, a rear light is indispensable for your own safety. That's why you always have your small oval Smart RL403 R diode rear light with you. With its universal mounting, it fits any seat post. Once turned on, you can choose between three brightness levels that can alert others from up to 600 meters away. This way, everyone can see that you are on the move, even at night.