Thanks for prompt reply, Macadam bikes seem to be publicized on internet, perhaps more known in France? Very nice build quality. Anyway, it was bought on an extended holiday in France. The crank motor has 4 power assist settings accessed via handle bar button pad and also by + - buttons on computer display. Both can enable scroll through information options and alter power, but the speed/distance/trip log is out of action. Only once, on my last run of 10km did it flash up number 45? for a second then went dead? I have checked the magnet spoke/pick up are in line, even temp. moved the pickup closer but had no effect. There are tiny square 'ports' on back of handlebar computer....maybe for other data inputs but no real instructions, only how to set handlebars etc! How I hate electronics!!!