ROCKBROS Bicycle Taillight with Light Sensor, Five Lighting Modes, 80-Hour Battery Life, IPX6 Waterproof, USB-C Charging, Tail Lamp, Cycle Light

【Brake Warning & Automatic On/Off with Light/Vibration Detection】This Q1MAX bicycle taillight is our latest enhanced version, equipped with a smart brake warning function. When it detects braking or deceleration, it illuminates at maximum brightness to alert those behind you. It automatically turns off in bright places (such as under strong sunlight) or after 30 seconds of stopping, and automatically turns on in dark places (such as inside a tunnel) or when vibration is detected. (Double-click the button to switch between automatic and manual modes. In automatic mode, the light/vibration detection function is turned on.) *The Q1 model does not have the above functions.

【Five Lighting Modes and Battery Level Check】One button allows you to switch between 5 lighting modes. *Q1: Red light flashing (20 hours), alternating red and blue flashing (20 hours), 7-color breathing flashing (15 hours), red light rapid flashing (50 hours), red light constant (8 hours). *Q1MAX: Red light flashing (25 hours), alternating red and blue flashing (30 hours), 7-color breathing flashing (20 hours), red light rapid flashing (80 hours), red light constant (15 hours).

[USB Charging & Battery Level Check] This bicycle taillight has a built-in 300mAh battery that doesn't require dry cell batteries and can be repeatedly charged via USB-C, eliminating worries about running out of battery quickly. It's very convenient. It has four blue battery status indicators that intuitively show the battery level when powered on. It's also easy to know when to charge. *Charging time: Approximately 2 hours. Charging cable included.

[High-Strength Aluminum Alloy & IPX6 Waterproof] Made of high-quality aluminum alloy, it's lightweight and sturdy. It has excellent impact resistance, heat dissipation, and corrosion resistance, and feels great to the touch. The bicycle taillight uses IPX6 waterproof technology, providing reliable waterproofing even in bad weather or on bumpy roads. It protects the taillight from water that can cause malfunctions! Perfect for everyday use such as commuting to work or school, as well as outdoor activities like hiking and cycling.

[Easy Installation & After-Sales Service] It can be attached to either the seat rail (under the saddle) or the seat post (the necessary tools for both mounting methods are included). Quick and easy installation to suit your bike and preferences. *A one-year warranty is included. If the product breaks down within this period, please do not hesitate to contact us. We provide reliable and satisfying after-sales service. Please rest assured.