Stable operation. Since the relay latches in the ON or OFF position, power outages do not result in a change of state. (Lights stay where they were after a power outage).
UL Listed AIC rating. Relay has a 10,000 AIC rating for added safety.
Ability to support multiple input devices. After the relay responds to a momentary pulse, it is then "free" to accept another pulse from any other control devices wired to it. The relay position is always controlled by the last signal.