Seeed-103020007-Grove-Screw-Terminal-Seeed-Studio-103020007-Seeed-103020007-Grove-Screw-Terminal-with-four-3-5mm-pitch-pins-rate-up-to-125V-6A-The-terminal-can-accept-30-to-20AWG-wire-which-makes-it-the-most-common-pitch-screw-terminal-br-This-grove-has-four-ports-including-GND-VCC-&-two-other-undefined-ports-&-the-screw-terminals-are-commonly-used-to-connect-a-chassis-ground-such-as-on-a-record-player-or-a-surge-protector-Most-public-address-systems-in-buildings-also-use-the