The device consists of Red, White and Blue LED light indicators. These are located toward the bottom of the 'B'.
Blue = On
White = Charging
Red = Error
Unfortunately, the silicone is quite dark and it may be difficult for you to see these lights. We are working on the ability for users to control the brightness of the LED lights. Without this, the lights can be quite overwhelming at night. To avoid this, we chose to darken the silicone. We are going to fix this in the final product.