Wireless key finder locator find lost chain locater whistle Black&Red 100% brand new and high quality Small in size , portable and convenient find your key or any other items easily. Remote control by sound Whistle or shout within 7 meters to make it beep and flash Powered by 2 AG3 batteries. Color:Black&Red Notes: Any loud noise will cause the key finder to beep and the light to flash. So if you are near a loud TV or loud noises, make sure to turn down .