SSCP7 LED bicycle light Material: aircraft aluminium Finishing: third grade anodisation Luminous Flux:900lm LED Life Span:50,000 hours Battery: 8.4V ,4.4AH lithium battery Discharge Time: 180mins(100% brightness) Charge Time:3.5-4.0H Modes:100% brightness & 30% brightness & Flashing(2.4Hz) Weatherproof Grade: IP65 Size:43mm(diameter)*50mm net weight:0.42KG accessory: battery pack, helmet mount, charger