【5 Super Bright Light Modes】Tellegante's latest bicycle taillight features 22 built-in super bright LEDs arranged in a ring, emitting a striking red warning light visible from hundreds of meters away, significantly enhancing cycling safety. With 5 unique light modes: Constant Light, Slow Flash, Fast Flash, Strobe, and Breathing, it can meet our various needs and offer a variety of cycling experiences.

【Brake Detection & Vibration Switch】The rear bike light has a brake detection function. When deceleration or emergency braking is detected, the brightness increases significantly and remains on to warn those behind you, improving safety. When the speed returns to normal, it reverts to the normal light mode.

The 30-second vibration detection function allows it to automatically turn off when not in use and automatically turn on when vibrations are detected. 【500mAh USB-C Rechargeable Battery】This rear bike light has a built-in, ultra-high-capacity 500mAh battery, providing up to 15 hours of runtime, allowing for two long night rides. Whether it's a short or long night ride, it's easy to handle. With its USB-C charging port, it can be charged with any USB-enabled device, such as a laptop adapter, power bank, computer, etc. 【IP65 Waterproof & Aluminum Alloy】Unlike plastic casings on the market, our casing is made of aluminum alloy, which is very hard, durable, and reliable. It also has a high-quality IP65 waterproof design, allowing us to easily withstand bad weather. Whether you enjoy mountain biking, road cycling, or professional cycling, this rear bike light is the perfect choice. 【Saddle and Seatpost Mounting】This rear bike light has two mounting options (two mounting kits included): one for mounting on the seatpost and the other for mounting under the saddle. Whether you are a professional or amateur cyclist, these two installation methods can fit almost any bicycle on the market and are the best companions for cycling.