The voltage in Thailand is 220 volts compared to 110 volts used in the United States.
Transformers are also available in a variety of sizes at reasonable costs.
Surge protectors are available in Thailand. Do not bring a surge protector from the United States unless you know it is rated to handle 220 volts. Do not bring a television from the United States. Multi-system VCRs can be purchased in Thailand. This means that you can play commercially made tapes from the United States and Thailand.