BICYCLES ARE STOLEN EVERYWHERE AND EVERY DAY no matter they are with or without locks. To protect your bicycle from being stolen, This App can work with a bluetooth 4.0 (BLE) device GS201 as a TWO-WAY WIRELESS BICYCLE ALARM SYSTEM can be your best solution. Once the bike theft happens, the Bike-Guard will immediately activate an emergency alarm to warn you to check the bicycle and take the necessary actions urgently. Therefore, with this device armed on the bicycle, whenever you want to take a short break in the cycling journey, there is no need for you to worry about parking your bike nearby. the demo you can watch the youtube:
http://www.youtube.com/watch?v=LIEp0OPezSI