双面，FR4，绿色阻焊，有铅喷锡

FR4,蓝色阻焊，喷锡，可做有铅和无铅，白字符电路板线路板PCB板：2018-08-23 10:06:08

Ultralight four-curved surface Thin, round, comfortable grip Four curved glass body, ultra-light 7 series aluminum metal middle frame, water drop arc waist design.