The Wi-Fi valve is considered the main valve. In the event of a power failure, the valve will continue to watch over your property for up to 48 hours if you install an uninterruptible power supply and use AAA lithium batteries. The Zigbee valve is often used as a secondary valve. It requires installation of the GT130 gateway or any other compatible gateway. In the event of a power failure, no signal can be transmitted between the detector and the Zigbee gateway. This means that the closing signal cannot reach the valve.