Smart enough to water plants while you are away! Safe enough to be placed indoors!The first Self Watering Garden Bed from Hills for both indoor and outdoor use. You now have the ability to grow your own vegetables, fruit, herbs, plants and/or flowers, without the demand of time to keep them thriving.Via its capillary action, the innovative wicking system delivers moisture to the plant"TMs roots from below. Since the water is delivered to the roots of the plants from the bottom up, minimum water is lost through evaporation as it usually is when watering from the top down. By minimizing the evaporation of water, less water is required and plants can be watered less frequently. • 2 Sizes Available • Self-Contained design for no mess, no fuss • Leak proof design makes it suitable for any surface: " ̈tiles, decking, carpet and more • Inbuilt wicking system delivers moisture from the " ̈base directly to the plants roots • Reduces loss of water through evaporation • Comes with a moisture reader so you know when to water (no batteries needed) • Requires 44 lbs (20kg) of sand (washed river or concreting sand) and 79.25 quarts (75 ltr) of potting mix or top soil • Powder-coated galvanized steel Liner - Black flexible PVC, UV stabilized, 0.35mm thickness 24"� (61cm) L x 18"� (46cm) W x 17.7"� (45cm) H 25 lb (11.5kg) 3 year warranty against defects.1 year warranty against defects on moisture reader and liner.