Easily locate your cane with this square shaped Bluetooth Cane Finder Charm! This Bluetooth Cane Finder Charm works with any Android or iOS device. The required app is fully accessible with smartphone screen readers. Instructions for replacing the batteries come with the tracker. This square shaped charm comes in either black or white. The charm size is 1 ⅜ inches by 1 ⅜ inches by 3/16 inches. Note: Easy setup and instructions for using the charm and phone app will be emailed to you. Phone support is also available.