Easy and convenient scheduling from your device through the app within a range of 30 ft. Flexible watering options – water on specific days of the week or on a schedule of every few days. Each valve works like a separate timer with up to 12 customizable start times per day Minimum requirements: iOS 9 or Android 7.0, Bluetooth 4.0 Requires 4 x AA batteries (not ) Backed by a 7-Year Limited . stands behind its products.