I hesitated following comments by some client stipulating that the sound of the alarm clock gradually rose to become unbearable: it did nothing! Just make the adjustments to the end and all is well! 2 programmable alarms with 3 different types of sound: buzzer, radio or "nature". The mode "week" is very significant: you program the alarm clock to ring Monday through Friday. The weekend is off. 3 levels of brightness: 1 powerful, 1 normal and 1 very small to not lit up the room when you want to sleep. The program may seem tedious, but once well set, this alarm clock is nickel. No regrets for this purchase. (The temperature sensor is for me a gadget that I do not use it)