The Denny has integrated brake lights and turn signals, a no maintenance belt drive instead of a chain, and a removable handle bar that doubles as a bike lock. Sensors tied to a microprocessor can detect if the cyclist is struggling up a hill and automatically downshift or upshift to make an easier ride. The technology is also tied to an eAssist battery-powered motor in the front hub that kicks in when the bike is going uphill.
(via)