Take the guesswork out of watering with a rachio smart sprinkler controller. The easy-to-use mobile app lets you manage your sprinklers without running back and forth to the controller, while automatic weather adjustments mean no more watering in the rain. Get peace of mind – rachio knows just how much water your yard needs. Control your sprinklers using a smartphone or with category-leading smart home integrations, including amazon Alexa and more. Master valve-compatible with master valve, pump relay, or indexing valve. Wi-fi connection – wi-fi (2.4ghz) required. Supports dedicated 2.4ghz and dual-band networks. Cannot operate on 5 GHz only networks. Sensors rain sensor – wired & wireless normally closed (NC) sensors, soil sensor – wired & wireless normally closed (NC) sensors, wired flow sensors.