The package contains a single locator. Free platform: the use of the application at no additional cost and without subscription. Note: the battery is not included in the package; you need to purchase a CR2032 battery. Bluetooth tracking: Article Locator uses Bluetooth 5.0 to connect iOS, iPad, and other smartphones. You can check the location of a lost key, pet, or other item via the app. Portable and practical: dimensions: 37 x 37 mm, weight: 8 g. Can be used as a wallet tracker or item finder. Breakpoint locator: when Bluetooth disconnects, the device alerts and the app saves the last known position. Two-way search: double-click the button on the finder to make your phone ring. Open the app to locate the device.