A system for testing semiconductor devices is disclosed. At least one conduit is connected to the nozzle for delivering a fire suppression fluid to the nozzle. The server 1 comprises a character training-type game device 10. A mutual inductance between the primary coil and the secondary coil can transform the level of voltage, current and impedance of the signal amplifier to generate an output gain greater than 1, so as to amplify the audio signal.