Quote Originally Posted by Patanawet View Post
Yes, the UK voltage and Thai mains voltages are similar (230 and 220)..
Most modern devices will accept anything between 110 (USA) and 240 (old UK voltage).
In 'the old days', USA devices would only accept 110 volts and you needed a hefty voltage transformer but, I believe, these days most are accepted (please correct if wrong).
You are wrong in many instances. Some devices will only work properly on the correct voltages. Always best to read the manufacturers instructions. Hair dryers are a good example; plug a US hairdryer into a 240 volt outlet and kaput!