Using this flower moisture sensor is a breeze. First, find a spot in the soil near your plant and gently push the sensor into it. Once it's in place, the sensor will start monitoring the soil's moisture level. When it detects dry soil, it'll flash red, so you know it's time to water your plant. When the soil is hydrated, it'll show a green light. As for the pack contents, you can choose between a Lotus or Rose light - diffusing push - on flower head to add a nice touch to your plant setup. The plant watering guide inside the pack can give you more tips on how often to water your specific plants. Remember, you'll need to get a AAA battery (not included) to power the sensor. To keep it working well, occasionally check the sensor for any dirt or debris and clean it gently with a dry cloth.