Ecooe Waterproof Ultra Bright 1400 Lumens 5-Mode Bicycle Headlight with 8000mAh Rechargable Battery / Head Strap / AC Charger / Installation Strap Super-Bright: Produces bright and long beam with up to 1200 lumens output and 200-meter distance. 5 Lighting Modes: High (100% brightness), medium (50%), low (15%), flash, SOS modes to adjust for different lighting conditions and emergencies on the cycle route. Screw and Tool-Free: Mount the light to your bike firmly and total screw-free with the high-strength rubber strap. Two rubber straps with different sizes provided to suit different bike types Battery Life: High-capacity (8000mAh) rechargeable 18650 battery set provides 3-4 hours of use in high light mode, or 8-10 hours in low light. To conserve power, please remember to disconnect the battery set from the bike light when not in use. Waterproof & Weatherproof: At IPX6, the bike light (exclude the battery set) can resist water effectively whether in rainy, foggy or snowy days. We suggest to install the battery under the bicycle saddle to avoid the rain