The Charger is perhaps the most advanced vehicle ever designed for personal use! Both the electronic and mechanical control you have, make this bike the greatest! The Shimano 7 speed internal hub transmission, activated by the Revo twist shifter...gives you a wide range of gears, to further let you choose how much (or little) you wish to struggle! Try down-shifting at a stop sign on any other e-bike...or pedaling in any gear with no motor drag whatsoever!