Product Description: Name: T51 Intelligent induction headlamp Water Resistance Level: Waterproof Power Source: Rechargeable Accessory: Charging Cable Power Supply: Battery Powered (no Plug) Battery Properties: Rechargeable Battery Rechargeable Battery: Lithium Battery Battery Capacity (mAh): 2000 Product weight: 128g With package: 189g Light source: LED+white side lamp+red blue side lamp Charging mode: digital USB charging Battery life: approx. 4-25 hours Sensing distance: 10-15cm Gear illumination: High 100% / Medium 50% / Low 20% Endurance: T51 induction headlight: 10 to 12 hours for 100% strong light, 18 to 20 hours for 50% medium light, 35 to 40 hours for 25% weak light Gear position: Highlight the first gear; Second gear low bright; Third gear explosive flash; Fourth side white light; Five gear side light flash with red and blue light; Long press the "ON key" to turn on the sensing mode.