🔧 Upgrade Your Comfort Game! Works with both 2-wire and 3-wire thermostat configurations. Directly replaces any brand name relay for hassle-free upgrades. Built-in 24V transformer simplifies setup—no extra components needed. Epoxy-soundproofed design guarantees a peaceful environment. Immediate relay activation ensures optimal temperature regulation. Soundproofed 24V transformer Electromechanical The Aube Technologies RC840T-120 Electromechanical Relay is a versatile and efficient solution for temperature control, featuring a built-in 24V transformer for easy installation and compatibility with various thermostat connections. Its soundproofed design ensures quiet operation, making it an ideal choice for modern living spaces.