High-powered bike light:         

1.LED: 1x XML2 10W LED          

2.Light output: 550 Lumens / Max output     

3.Battery: 1x 18650 Li-ion battery,3.7V,2200 mAh(Included ) 

4.Length of USB cable: 20 cm       

5.Size: 95x80x30 mm

6.Weight: 124 g   ( Battery included )

7.Material: ABS,Acryl,Silicone.

8.Function(4 light modes): 100% brightness,30% brightness, white light and yellow light flash alternately,yellow light,OFF.  9.Water resistance: IP65

10.Runtime: 2.5h / High mode, 5h / Low mode          

11.Charging time: 3.5 h    

12.Battery indicator:100%-75%-50%-25%.