... ,High lumen 4,High stability CREE Waterproof 3 bike led light Features:1, LED Chip: CREE High Power LED2, Integrated digital circuit board ... Regulation oxidation color: Asian black9, 4x18650 battery capacity: 4400mAh10, Voltage: 8.4V, sustainable work 3-4 hoursApplications:1, Bicycle lighting, fixed ... on one's head by headband CREE Waterproof 3 bike led light