United States. The product is dysfunctional for the following reasons [i] It English version of user's manual is not readable [ii] USB cable that sent is too short [iii] On its digital display of time--it shows involuntarily temperature also that too inaccurately. The dealer was contacted but appears helpless to resolve. The item is kept packed for dispatch to claim full refund. But the dealer offers just 10AUD as compensation! Thanks for your appreciation. Regards. Subramaniam Sankaran