This is perfectly designed for seatpost mounting. The silicon band is just right and the back of the light has a silicon textured surface which grips the seatpost and keeps the light there. Several brightness and blink patterns are selectable from a single button press. Holding the button powers on off. I wasn't too fond of the USB prong style charger (verses the cable) because it takes up too much space on my USB strip, but I've adapted. I think I still prefer a cable, but I really like this light.
This light is great piece of mind for riding both day and night.
