10W bike light / led bicycle light / bicycle lamp Material: aircraft aluminium Finishing: third grade anodisation Color: black LED:SSCP7 Luminous Flux: 900 Lumins LED Life Span: 50,000 hours Battery: 8.4V 4.4AH lithium battery Discharge Time: 180 minutes (100% brightness) Charge Time: 3.5-4.0H Low Power Warning: low power red light warning Lighting Modes: 100% brightness % 30% brightness & flashing(2.4HZ) Weatherproof Grade: IP65 Size: Φ43*50MM N.W.: 0.42KG