Pretty sophisticated..
https://electrek.co/2021/08/31/radical-new-electric-bike-drive-systems-requires-no-chains-or-belts-entirely-ride-by-wire/?fbclid=IwAR3B0j1gl6c3wM-2ad4JIulY742PwBroPD5XOn0s0r0_PGVMr186s4ij5Vs
Very interesting ....I bet they will have a 750w version in no time.....