Monkey uses beacon technology to create a wireless bond to your child. So, you can let them wander but ensure they dont stray too far. Beacons are easy-to-carry devices that periodically emit a bluetooth signal. The Monkey app listens for these signals in order to gauge the distance between you and your child. The app triggers notifications the second your Monkey strays too far, so you can respond quickly and keep them safe. Monkey works with multiple children (or pets!). Add as many beacons as youd like and track some or all at the same time. Monkey is also customizable, allowing you to identify your Monkey beacons with names and photos, and tweak your sensitivity settings to make it perfect for you.