Treatment of materials; engraving; leatherworking; setting; custom manufacturing, to order and according to the requirements of a customer, of smartphones, mobile phones, digital tablets, laptops, smart watches, telephone headsets, in-ear headphones, smartphone covers, smartphone cases, mobile phone cases, computer peripherals and accessories; customization services for decorative purposes of smartphones, mobile phones, digital tablets, laptops, smart watches, telephone headsets, intraocular ...