The Magic Finder can save you the aggravation of trying to track down items that you’ve misplaced. Simply attach it to things you most commonly misplace like keys, remote controls and wallets and then download the free app. It works with any iOS/Android smart device. If you lose the item, you have a choice of three ways to find it. You can use the radar screen, which tracks the distance to your item, enable blink and ring to track the item by sound and light or use the 2-way tracking, which activates an alarm on your phone. Using the same app, you can track up to eight items at one time and it has a 150-foot range. The Magic Finder uses a replaceable CR2016 standard watch battery (included). It is also great for luggage, purses, cars and pets.