●Meet Amazon Dash Smart Shelf ? Our auto-replenishment scale senses the weight of everyday items and places a reorder or notifies you when you’re running low. ●Never run out ? Dash Smart Shelf makes it easy to stay stocked on your favorite pantry staples, office supplies, pet products, and more. ●Save money ? Save $10 on your first smart reorder. You can also get Subscribe & Save discounts on a variety of products. ●Youre in control ? Customize your preferences in the Amazon Shopping app at any time. If you dont want automatic reorders, you can get notified when youre running low instead. ●No outlet needed ? The included batteries last 2+ years. If you prefer wall power, you can add an adapter and a power cable (sold separately). ●Find the right size ? Dash Smart Shelf comes in Small (7" x 7"), Medium (12" x 10"), and Large (18" x 13").