This is one of the cheapest bluetooth low energy tags currently available. (aka iTag, MLE-15, Intelligent Bluetooth Anti-lost Tracking Tag Alarm Patch)
Purchased online for less than 4$.
![Bluetooth Low Energy Tag Package](/sites/default/files/pictures/noname-bt-tag/bluetooth-low-energy-tag-package.jpg)
Lets look what's inside to find out if it is hackable/reprogrammable.