Stylishly keep tabs on your keys with the Mad Man Leather Bluetooth Keychain Tracker. When this key finder is connected to your phone, your phone will make a sound alert whenever the key-finder’s button is pressed. Alternatively, on pressing the “Ring” option on the App, the key-finder will beep and its LED will flash. Mad Man, masters of men's gifts. Material: Genuine Leather/Metal. Dimensions: 4.75" x 1.25"