Use this when on an outing with your loved one. Imagine that you turned for just a moment and they are no longer standing there. Utilize the world’s best-selling Bluetooth tracker to ring your loved one to find them instantly within 250 feet. Operates from a free app on your Apple or Android phone. Attach the Mile-Tile to your loved ones keys, purse, backpack, drop in their pocket, and more. Use the free app to ring your loved one within 250 feet. The Mile-Tile is water resistant. The battery is guaranteed for three years.