You have a device (or possibly a few) of an advanced design. While the True Brujah are not especially good at innovation, they are good at making improvements. So this device has no special functions unavailable to its contemporaries, but it does work a lot better. It reduces the chance of a mechanical fault (such as a jam) by half and all uses of the device are made with a -1 to the difficulty. The Storyteller should decide on the cost of the Merit, depending on how many items the character has, and how powerful they are.