Sensitive touch control 3-level adjustable brightness. 
Touch to deliver 30% of its total light output, touch again for 50%, next it's full power, then touch again to turn it off. 
Power by universal standard lithium-ion battery #18650 (included) with 80cm (32") long USB cable. 
Shell color : white or green
Simply recharge with USB cable.

Working time: 2 ~ 4 hours 

Charging time:3 hours