Check moisture of indoor plants at root level, not just at the surface. Inserts 7 in. into the plant. On demand instant checking or continuous checking with a reminder to water. Red/Green easy to understand traffic light system. Flashes green every 30 min when the plant has optimum moisture. Flashes Red every 15 seconds when it requires watering. Attractive flower design. Very long battery life - 1 AAA will last over 3 years Check moisture of indoor plants at root level, not just at the surface. Inserts 7 in. into the plant. On demand instant checking or continuous checking with a reminder to water. Red/Green easy to understand traffic light system. Flashes green every 30 min when the plant has optimum moisture. Flashes Red every 15 seconds when it requires watering. Prevents both over and under watering (80% of plants die of overwatering). Attractive flower design. Very long battery life - 1 AAA will last over 3 years under normal use. Durable and long lasting material Reusable Establish root development