smartphone controlled LED Helios handlebars are getting a lot of  "transform any bike into a smart bike with Helios Bars." Comes with 500 lumen front light and integrated turn signals.  Connect via smartphone to the control the color and intensity of the lights, and set several other smart features. The rear facing lights can function as a visual speedometer, changing color as you speed up or slow down. They can also function as turn signals, operated by tactile buttons on either side of the stem.  GPS in it as well.  How do I charge it?