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Question Does the RH450/ RH750 have an auto switching power supply What should I do when connecting in another country with different voltage  Answer Yes. the RH450 /  RH750 has an auto-sensing switch-mode power-supply which accepts any mains voltage from 100 to 240 volts you do not have to change settings, fuses or anything else. You just need to get the right AC plug for the country you're in.