The clock is running without any noise, only if he is to ring, then he makes powerful noise! Just the thing for an early morning wake-up. He works mechanically, there is of course no snooze function or similar ... For me it is so far from the bed that I have to get up to switch off and then after that'm really awake. And I use it as a backup whenever there is a risk that I might miss my flight or departure date in view of actually sleeping night get-up. Overall, he is of good workmanship and quality for this price.