We hacked a bike bell so that from the outside it looks like an ordinary bell, however on the inside it’s nothing but normal. It is packed with electronics and uses Bluetooth Low Energy (BLE) to connect to your iPhone. When you park your bike and walk away from it, you break the bluetooth connection to your bike and the app will automatically drop a pin on the map. This gives you the general location of your bike using GPS. With BLE you can use your phone to even more precisely locate your bike’s position. But in the insanity of these bike parking lots, this may still not be enough as you often stand right by your bike and have difficulties spotting it. This is why we added the ability to remotely ring your bell directly from the app. This makes it easy to find your bike using your ears instead of your cluttered sense of sight.