I take off a star because it has just started to do the problem of long bipp - procedure on / off without effect Contacted the free phone support, immediately proposed a standard replacement! Fortunately it is still under warranty Despite this, it is the fourth identical model I have and it's the last he bought two years ago - the others I have are older and perform flawlessly and I have not changed that Battery time after a number of years. So I recommend anyway! I am a customer particular title and now professional in the past, and always bought APC