this one ( at least with the bigger motor upgrade ) has 4 levels of speed/ power modes... and there is a sticker on the bike that 17 mph is the top speed, but I suspect that is the "original" top speed, and expect with the half again bigger motor upgrade, that it probably goes faster... how much will be proven later, though I expect 17 is fast enough for my wife... but she has been talking about "road biking" the few miles to a gal pals house in the country, with good paved roads an option in between... were it mine, I'd probably open it up, on the paved country roads...
it is foldable ( though that loses any advantage when the rear wheels are 30 inches apart ) also I did not find an assembly instructions... it was mostly assembled and very well packaged, with most unassembled pieces being tool-less connections... there was a manual on the battery, use, and maintenance, charging, and safety, and most actual hardware was already on the bike and just required loosening and installing the parts ... everything was pretty intuitive, for a mechanical guy... it has lights ( though I may have a problem with the head light, as it hasn't come on... there is a patch cord, when used with a basket on the front... and I mounted that upside down, on purpose, with the thought of putting the dog in the front basket ) but it also has brake lights, and turn signals, hydraulic disk brakes front and rear, with easy locks on both, for parking... I'll go. through the numerous packing materials in search of operating instructions, but think we figured out the basics... it took a while to figure out how to turn it off, and if the parking brakes are applied, the brake lights are on, unless the bike is turned off...
it's definitely not the simple machine bikes started out being...