There are no pedals on the EMOVE Roadrunner..
More than likely, you would run out of juice if you have a trip over 50 miles on the EMOVE Roadrunner.
I doubt EMOVE Roadrunner has regen capability.
IME, regen function on ebikes would only allow 5%-8% addition to total range, depending on rider weight, terrain and wind direction.
ebikes are too light in weight to allow much regen to occur with downhill riding, if you have regen braking that still would not add much more than 5%.