the story continues: after paying again for a new bike what had to replace the previous bike we got an error after one day. again they start sending new parts what takes time so the bike can't be used. the first bike is still not working after changing parts in 4 months time. i asked to change the bike for a new one but again they refused. companies like 7go don't belong on alibaba. the refund also still hasn't come back. please don't order here; the moment you have a problem you can wait forever and nothing happens when the problems aren't fixed after months. order your bike local where you get service.