I be travel to London for eight day with carry-on luggage only so be look for the smallest alarm clock I could find but with a alarm I could hear . this travel alarm clock more than fit the bill . very small , so easy to set the time and alarm , neatly design to stand up and be easy to read in the dark by the push of one button and unlike other travel alarm I have use not once do I sleep through this one . a great little clock at a great price . highly recommend .