About this item This 3.5mm audio adapter is designed for connecting microphones, earphones, and audio/video devices. It offers a quick and convenient solution without the need for soldering. The 3.5mm to screw terminal audio adapter allows you to connect single wires with open cable heads to a 3.5mm jack. Featuring a 3.5mm Stereo TRRS Female Jack on one end and a 3-Screw terminal block on the other, this adapter facilitates connections between open wires and a 3.5mm stereo TRS plug. The solderless screw type design is gold plated for maximum signal transfer and durability. Connector 1: 3.5mm 4 pole male jack, Connector 2: 3-screw green terminal. Dimensions: 4.6 x 1.9 x 0.5 inches.