Grove - Screw Terminal with four 3.5mm pitch pins
Grove - Screw Terminal with four 3.5mm pitch pins. Terminals can accept 30 to 20AWG wire. This grove has four ports, GND, VCC and two other undefined ports. Screw terminals are commonly used to connect a chassis ground, such as on a record player or surge protector. Most public address systems in buildings also use them for speakers.