Given the previous reviews I mattendais a much stronger tone, I find right amount, neither too much nor too little. The settings are very simple, very small buttons (2mm in diameter) and the batteries are included. If you can not choose the duration of the "snooze", this is repeated every 8 minutes it suits us or not. On the instructions batteries are for a one-year lifespan in normal use, will be seen over time. Anyway, at that price I am very happy with my purchase.