The app does not require any special lock box to work. No Bluetooth or internet-controlled lock box is needed. It works with any of the following:

• Combination padlocks, like the ones that you would often find on luggage.
• Combination lock boxes, also known as a realtor lock box.
• Digital safes.

A combination padlock is often too heavy/large to attach to the chastity cage or belt, so would instead be attached to a box/container that holds your keys.