1.25mm Pitch 4-pin Cable Matching Pair - 40cm long [Molex PicoBlade Compatible] : ID 4722 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits
10pcs 3.5 Headphone Jack Audio Jack Pj-320d 4 Pin Smd Mp3 Accessories Pj320d - Connectors - AliExpress
20pcs 3.5 Headphone Jack Audio Jack Pj-320d 4 Pin Smd Mp3 Accessories Pj320d - Connectors - AliExpress
Circular Sensor M12 A B D 3 4 5 8 12 Pole Male And Female Straight Plastic Cable Mount Pg7 Connector Ip67 For Signals - Buy Binder Circular Sensor M12 M12 A B D
3.5mm Female Audio Connector 4 Pin Dip 10pcs | Mini Jack Connector 3 5 - 10pcs /lot 4 - Aliexpress
10PCS 3.5 headphone jack audio jack PJ 320D 4 pin SMD MP3 Accessories PJ320D|Integrated Circuits| - AliExpress