You will not have to worry about trying to reset your clock every time you reach a new destination. This World Time Clock can be pre-set up to 18 destinations so you always have the local time – as well as the time back home; Time zones - Wellington, Honolulu, Los Angeles, Denver, Chicago, New York, Rio De Janeiro, London, Paris, Cairo, Athens, Moscow, Dubai, India, Bangkok, Tokyo, Sydney. Also has Multiple time zone display, Alarm,Snooze function, LED torch. Brought but forgot to pack it when we travelled, so it has never been used.