The manual of this hand sewing machine is don't like Mobile Phone or TV, through the manual you can completely learn how to use, it is a professional machine, in general, you need learn it from shoe repair training mechanism if don't use similar machine before. our company will tell customer about this before they buy, if need more professional machine, we will recommend more better machine, like SP168, SP998 , but Due to price factors, more customer choose the cheaper machine, Unless the workload is large,then they choose expensive machine, however, when they choose cheaper machine, they also want the machine work high efficiency like expensive machine, this is hard achieve for cheaper machine, anyway, you will get what you pay, we all understand this principle,