This genuine K-Rain 1522 pump start relay is perfect for irrigation pumps with a 3HP capacity and a voltage range of 110V, 220V, and 24V. It comes with a range of features such as temperature difference measurement, LC-display, safe stop technology, smart schedules, auto-off, selectable weekdays, water consumption data display, frost warning, humidity level setting, and water now function. The product line is K-Rain RPS 624 and it is suitable for flexible automatic irrigation with individual watering schedules, occasional watering, and plant pot irrigation with micro-drip-system. It has a female 1/8 in threaded connection and is compatible with various smart home protocols such as Clear Connect, Bluetooth, Infrared, Powerline, Wi-Fi, Near Field Communication (NFC), Zigbee, Sub-GHz, Proprietary, Not Applicable/Not Available, Thread, HomePlug, KNX, X10, Ethernet, Insteon, Z-Wave, EnOcean, and Power