It looks like the sensors/controls are built into the object, with the CPU, battery and radio (the more expensive part) being movable? So, it attaches to the ja

It looks like the sensors/controls are built into the object, with the CPU, battery and radio (the more expensive part) being movable? So, it attaches to the jacket and exposes some controls, it attaches to the backpack and enables some controls. It attaches to the shoe and reads sensors? I guess that means you don't have to plug in your jacket or your backpack, and helps to amortize the cost across a wardrobe? Maybe it's purely to get the battery close to a wall socket.