Birds need open water in winter as much as in summer, and not just because they're thirsty. Without regular cleaning, their feathers lose the ability to insulate against the winter cold. This heated birdbath always draws a crowd. A thermostat control prevents freezing and saves energy on warmer days. Ground-level bath has a 3 footed stand for stability Deck-mount bath clamps to any 2 x 2 or 2 x 4 railing Standing bath is 43" H with ground stake Provides life-saving open water for birds to drink and wash. Water won't freeze -- even at 20º below zero Thermostat saves energy on warmer days. Bowl has heat-absorbing foam insulation 14" diameter Holds 12 cups 13" power cord Bowl and powder-coated metal feet are weatherproof