It works for a while, you cannot change the battery so if you get one with an old battery it won't last very long. But, I paid about $5.00 for a set of two, so I guess in that light they were OK.
THIS CROW STARTLED MY FAMILY AS THEY WALKED BY IT AND I REALLY LOVED IT BUT AFTER ABOUT A WEEK IT STOPPED MAKING NOISES. REALLY DISAPPOINTED IT DID NOT EVEN LAST THE HALLOWEEN SEASON.