The ROCKBROS Smart Rear Bike Light is a versatile safety accessory designed to increase your visibility on the road. It features a 3-colour LED system capable of emitting red, orange, and green light, which you can cycle through using five different lighting modes, including constant and flashing options. To help conserve energy, the device includes an auto wake-up function that activates the light upon vibration and automatically turns it off after 30 seconds of inactivity when not in constant mode. Safety is further enhanced by an intelligent brake sensor that detects when you slow down, alerting drivers behind you. The light is housed in a durable aluminum alloy body combined with plastic and silicon, keeping the total weight at just 25 g. Its IPX6 waterproof rating ensures it continues to function reliably during heavy rain. You can easily recharge the unit via the included USB Type-C cable. Thanks to a universal flexible mounting system, this light is not limited to your seat post; you can also attach it to a helmet or a backpack. This makes it a practical choice for commuters and long-distance cyclists who need a lightweight, adaptable signal to stay seen in various environments.