Motion Sensor Birds, Chirps when you pass by! The charming, realistic-looking blue birds sit atop a "welcome" branch, ready to light up and chirp when visitors approach. Motion sensor bird's keeps watch over all your comings and goings! Wreath has a hook for hanging in your entryway or garden. Its built-in sensor detects movement within a few feet and greets you with a cheery "chirp" whenever you walk by. Measures 7 1/2"H x 7 1/2"W. Uses 3 button-cell batteries (included). Metal, polyresin.