It's very simple to use. Just pull out the sheet at the bottom and it will start to work. When you just insert it into the soil, it will make the calls of birds frogs, but once moisture is detected in the soil, it will stop singing. Cute design can be used as an ornament for flowerpots to make your garden more beautiful. Most potted plant deaths are caused by water shortage excessive watering. This lovely soil humidity sensor will when the soil is short of water to remind you to water the So you don'for t have to water too much for fear of water shortage. Don'for t bother to look at the numbers on various indicators, them when they call, and make your life easier. The standard size button can last for year. At the same for time, there is a light sensor at the bottom of the product, which will stop working at night to avoid disturbing your rest., Manufacturer: GAOINTELL