KeyFinder , The key finder that responds when you whistle at it. You no longer have to look for your keys when you leave. Whistle and it responds with a beep sequence, which is repeated 2 times. If you press the button, it also lights up with a red glow, so you can find the keyhole if it's dark when you get home. So hang your keys on KeyFinder and you don't have to look for madness again. Choose a color between BLACK, WHITE The delivery consists of 2 key finders of the selected color Specifications: Name: KeyFinder Material: Plastic housing with silver colored sides and button. Metal key ring. Weight: 13 grams Dimensions: Width x Length x Height 29mm x 55mm x 15mm Powered by 2 LR41 (AG3) batteries which are included. (There is a power switch on the side to activate the batteries)