See.Sense is motion controlled and has no switches. This is helps to prevent water ingress and also makes it easy to control (especially when wearing gloves in Winter!) Hold See.Sense. vertically and rotate it alternatively left and right three times. See.Sense. shows the fuel gauge before shining the main light.
You can watch a video of how to do this on our youtube channel. : https://www.youtube.com/user/cyclingtechnology