First produced in 1997 and brought back by popular demand, the Original Singing Bird Clock (10.7" makes a wonderful addition to your home or office. Clock features 12 of the most recognized birds in North America like mockingbird, house finch, house wren, Mourning dove, Baltimore oriole and more. Each hour a different bird sings and each sound has been authenticated by Cornell Laboratory of Ornithology. Bird clock also features a light sensor to deactivate bird songs when room is dark. It comes with an attractive hunter green frame. Clock requires 3 AA batteries (Not included).