An electric toy gun having therein a power break control mechanism consisting of an actuator, a power break control set and a swinging block. Moreover, parties may concurrently communicate with the interface, and the interface may have to manage several concurrent interactions with different parties. One of the bias pressures assists the spring to increase the system pressure and the other two bias pressures either balance the spring and one bias pressure or lower the system pressure. A shorting connection connects between two locations on one of the electrodes. The cover window includes a foldable region between plane regions that are on opposite sides of the cover window, and the plane regions have a first hardness and the foldable region has a second hardness that is smaller than the first hardness.