Feet up all the time. Controlled by a powerful stepper solenoid, the lateral counterweight in Teflon-lined vacuum tube oscillates back and forth rapidly, to compensate for every tiny motion, almost like a Segway. Includes high-level multi-stage diodic-capacitor which recharges itself automatically as you ride. Wheel motion sensor chip decides when to engage, allowing your feet remain on the pegs at all stops. Surrounding traffic is amazed at your balancing prowess. Attaches to rear rack with a universal mounting clamp (included). 10 lbs.