Color: Male Connector +Nut Terminal spacing 3.96MM, screw hole diameter 2.0MM, disassemble is required to use the width 2.0MM Flat head screwdriver Each adapter plate with special housing, comprehensive protection circuitry, no longer needto worry about wiring exposed; Each of cleaning washer water clean and free of rosin flux residues; Whole nine lines cited, the board clearly marked positive number, wiring more convenient; All-copper DB9 seat, anti-oxidation, exposure and better;