M09-0S Series Connectors 1 2 3 4 Pin Plug Socket The safety of push-pull self-locking system; Multi-core type with 1Pin 2Pin 3Pin 4Pin,high-density mounting saves space; Straight connector,Solder; Step-shaped (half-month) ferrule, with male and female pins at the same time, polarity positioning;; 360 degrees screening for full EMC protection.