With these alarm clocks youll never have an excuse to be late simply install 1 x aa battery not included and the clock will set itself to the right time and will even adjust itself when the clocks go back or forward ideal for your bedsideluminous tipped handscrescendo alarm with onoffbacklight for nighttime viewingsnooze functionchoose silver white black or dark bluemeasures 3 x 3 x 1buy any 2 colours and save 2