When connecting any electronics outside North America, it is extremely important that you check the specifications on the website or the power rating on the back of the clock or adapter to ensure that the input voltage is correct for your region.
Products that are compatible with power outside North America typically accept 110V to 240V. If the clock lists 110V or 120V only, a power converter would be required.
Voltage converter required outside United States and Canada.
Voltage converter not required outside United States and Canada.
Please check your clock radio manual for further specifications as each model may differ.