Have a green thumb, not a dirty finger! Sustee shows you it’s time for watering when the color changes. Grow healthy plants in your home to help purify indoor air. The slim profile of Sustee complements the appearance of your plants and because you leave it in place, it does not disturb growing roots. Easy to use: Place upright in soil between edge of pot and plant stem, just covering the depth mark on the Sustee Water your plant and give it time to absorb moisture and siphon up to the display window Color changes to blue, when the plant is watered Leave Sustee in the soil – when the color returns to white, it is time for watering Notes: Tested by professional orchid growers Use in potting soil that retains water and provides good contact with Sustee. Moisture detection is less accurate with sandy, loose, rapidly draining soil Use the large size Sustee for pots with soil at least 4.5 inches deep Use the medium size Sustee for pots with soil at least 3 inches deep Use the small size Sustee for pots with soil at least 2 inches deep When bottom of device becomes corroded or disintegrates it needs to be replaced Recommend replacing the core of your Sustee after 6-9 months of use, depending on soil conditions Keep away from small children to avoid accidents. Specifications: Bundle of 2 white size L Sustees with MB HANA “Instructions” for use No batteries needed Polycarbonate (body), preservative-treated non-woven fabric (absorbent filler) Length: 10 inches Humidity range: 20% to 80% Temperature limit: 41°F – 104°F Award-winning Product Design - Recognized internationally for excellence in quality and design. Reddot Design Award 2014 – Germany Design for Asia Award 2014 – Hongkong JIDA Design Museum Selection vol.16 – Japan Good Design Award 2015 – Japan Get one for each of your potted plants! Great gift to accompany a houseplant!