Love the choices of light blinks etc. the light lasts on bright blinking for 8-10 hours before needing charging.
Easy to take on and off bike seat post. I have an aero seat post design and the light stays facing back.
Light is small, easy to attach, bright, long lasting and easy to charge. I have a radar/light combination but riding at night or in the rain I wanted more visibility. No room for a seatpost light especially with my seat bag so wanted a small seatstay light. This worked perfectly.