Duration 4-6 Hours (According to the Power Bank Capacity) 

Max Range 300-500m 

Impact Resistance 1m 

Water Resistance IPX-7
LED Bulb 2 ×Cree XM-L T6/ U2 (LED with a lifespan of 100,000 hours) 

Battery Typek Power Bank ( Excluded)  

 Crust MaterialsT6061 Air Aluminum Alloy 

Switch Back Switch with LED Indicator Displays Remaining Battery Level Size Headlamp: 6 × 5 ×4cm N.W 95g (Excluded Power Bank) Packaging Common Box/ Gift Box (Customized) Optional Contents

5000mAh/10000mAh Power Bank Web.

http://www.okadu.net/bike-light/usb-bike-light/2000-lumen-bike-light-with-usb.html