A scent delivery device comprising: a cartridge structured to include a plurality of chambers containing a plurality of scented substances, including liquids, vapors or gas; a housing structured to include a compartment to hold the cartridge, an opening to allow the plurality of scented substances to dispense to an outer environment from the device, and a plurality of transporting channels formed between the compartment and the opening, wherein each of the plurality of transporting channels is configured to deliver a scented substance from the corresponding chamber to the opening for delivering a scent from the plurality of scented substances; a plurality of magnetic actuator switches respectively coupled to the plurality of transporting channels, each actuator switch arranged in a corresponding transporting channel and operable to be magnetically actuated to move between an open position and a closed position based on an applied signal to selectively allow passage of the scented substance from the corresponding transporting path, characterized in that the plurality of magnetic actuator switches include magnetically latchable gating structures including a first and a second mating magnetic components that are coupled in the closed position and uncoupled in the open position, wherein the first mating magnetic component includes a solenoid formed of a solenoid core having a substantially square-loop magnetization loop material, and wherein the second mating magnetic component is structured to bend or change its translational position upon a change in magnetic field from the solenoid core to actuate the opening or closing of the actuator switch in the transporting channel, wherein the applied signal includes a pulsed magnetic field which is produced by a short pulsed electrical current having a pulse duration of less than 1 second, and wherein the open position or the closed position of the actuator switch is maintained without any use of additional electrical power after the short pulsed electrical current is applied; and wherein said device includes a system in which pressurized, pumped, or fan assisted air at the inlet of system transports scented air through channels and outlet for scented gas delivery. a cartridge structured to include a plurality of chambers containing a plurality of scented substances, including liquids, vapors or gas; a housing structured to include a compartment to hold the cartridge, an opening to allow the plurality of scented substances to dispense to an outer environment from the device, and a plurality of transporting channels formed between the compartment and the opening, wherein each of the plurality of transporting channels is configured to deliver a scented substance from the corresponding chamber to the opening for delivering a scent from the plurality of scented substances; a plurality of magnetic actuator switches respectively coupled to the plurality of transporting channels, each actuator switch arranged in a corresponding transporting channel and operable to be magnetically actuated to move between an open position and a closed position based on an applied signal to selectively allow passage of the scented substance from the corresponding transporting path, characterized in that the plurality of magnetic actuator switches include magnetically latchable gating structures including a first and a second mating magnetic components that are coupled in the closed position and uncoupled in the open position, wherein the first mating magnetic component includes a solenoid formed of a solenoid core having a substantially square-loop magnetization loop material, and wherein the second mating magnetic component is structured to bend or change its translational position upon a change in magnetic field from the solenoid core to actuate the opening or closing of the actuator switch in the transporting channel, wherein the applied signal includes a pulsed magnetic field which is produced by a short pulsed electrical current having a pulse duration of less than 1 second, and wherein the open position or the closed position of the actuator switch is maintained without any use of additional electrical power after the short pulsed electrical current is applied; and wherein said device includes a system in which pressurized, pumped, or fan assisted air at the inlet of system transports scented air through channels and outlet for scented gas delivery.