... advance and precise, it can find almost all types of faults.l Manual Detection: easy to detect, it ... 12 blank keys around the LCD, 6 at the bottom and 6 at the right. If the SW_TC880 is ... powered on, the function of the keys will correspond ... the SW_TC880, there will have the following functions displayed at the bottom of the LCD, they are FUNC, RANG, VOP, ...