Latching relays, also known as bistable relays, are electromechanical devices that maintain their output state without requiring continuous power to the coil. Unlike conventional relays that require a constant current to hold their position, latching relays only need a pulse of energy to toggle between two stable states—typically "on" and "off." This unique feature makes them highly efficient and valuable in various applications where power consumption needs to be minimized, or where devices need to hold their state until the next instruction is given.