Sky Raker, Queen’s College

Anti-lost wallet:
A Bluetooth chip which pairs and communicates with a phone is implanted into a pre-made wallet. If the paired phone and the wallet is disconnected after a certain distance, the paired phone will receive a notification with sound, alerting the user. The wallet is capable of “two-way search” (wallet can seek phone while connected, and vice versa).
Added a external battery holder for changing battery by soldering, gluing the chip internally.