A handheld electronic device, e. The device may comprise an active area, an isolation area surrounding the active area, and a metal gate above the isolation area, wherein the metal gate comprises a conductive layer. The collar has a containment axial appendage of the resilient hollow element up to close to the terminal wall thereof. When a first computing device contacts the DMS server, the DMS server is operable to provide a bundle to the first computing device. The canister vent valve mounting structure between the canister and the canister vent valve is configured and arranged to retain the canister vent valve in at least two different orientations relative to the canister.