After using a multitude of mechanical timers, which in a few months sounded a bit when they wanted not to mention the numbers that eventually fade, I opted for an electric timer and this one as well and perfect at the programming that look and are very powerful magnet allows the paste or we want a 24H + delivery in a relay point of their choice all for a twenty, what could be +? (This is true only if it will ring a little harder when you're in another room ....)