About This Marathon Battery Life: MAX 10H Headlight/6H Taillight. Front light’s 4500mAh powerhouse runs 4-10 hours (depends on mode), while the taillight’s 500mAh battery lasts 3.5-6 hours – enough for an epic overnight bikepacking trip 5+4 Light Modes: The bike front cycling lights features a one-touch switch with 5 different lighting modes to suit your needs, including strong/medium/low brightness, fast flash, SOS. The taillight includes 4 different lighting modes: Steady On, Fast Flash, Slow Flash, and Breathing Flash modes, designed to alert following cars or people Military Grade and IPX65 Waterproof: The LED road bike light is crafted with a premium aluminum alloy shell, offering excellent impact resistance and heat dissipation, ensuring durability and longevity. The bike lights for night riding with an IPX65 water-resistant rating, you can enjoy cycling even in rainy, snowy or foggy conditions VIBRATION SENSING AUTO WAKE-UP: CYCLAMI bicycle tail light features automatic sleep mode after 30 seconds of inactivity and 30-minute auto-shutdown to conserve battery; A gentle vibration wakes the light instantly, resuming the last used mode—no need to reset settings. Ideal for frequent riders, this smart function ensures hassle-free operation and extends battery life SMART BRAKE SENSING TECHNOLOGY: This smart bike rear light instantly detects braking actions, triggering a 20% brightness boost in steady-on mode for 5 seconds to alert following vehicles—reducing rear-end collision risks during night rides; Perfect for urban commuting and road cycling, the intelligent brake response ensures maximum visibility when you need it most Overview Color : BLACK Brand : CYCLAMI Material : Aluminum Power Source : Battery Powered Water Resistance Level : Waterproof Item Weight : 190 Grams Mounting Type : Handlebar Mount Product Dimensions : 1.5"L x 1.1"W x 4.2"H Number of settings : 1 Brightness : 2000 Lumen