3.5MM, 4-Conductor Stereo Panel Mount ,Solder Pin1 Earth Spring, Pin 2 Microphone, Pin 3 Left Channel, Pin 4 Right Channel Overall Height: 0.644 Inch ; Body Diameter: 0.315 Inch; Threads: M8*P0.75 Chassis or Panel mounting. 3.5MM, 4 Conductor with Solder Terminals. With Attractive Knurled Nut Completely Sealed , Non-Switching Voltage Rating : 30V AC,DC Current Rating: 1A Contact Resistance: less than 30mOhm Insulation Resistance: 100MOhm Withstand Voltage : 50-60Hz. 500.60S Work Temperature: -40 Celsius +85 Celsius All Environmental Materials,Good Performance,Well Designed Metal Accessories Material for Copper, Surface Plating: Gold Plating; Plastic Material: High Temperature Resistance Nylon Material Package Included: 10 x Jacks 10 x Screws Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.