My first controlled device was delivered on 20/11/13 and returned: Batteries HS. This device has been replaced by back and delivered the 26/11 normal operation to date (???) I ordered a second digital switch comes on 18/12/13 after 15 days the batteries have passed away. To avoid back steps, I preferred to buy and replace batteries (LR44 2: 6) 14.99 So the final price goes to 20.99 Too bad !!! as this programmer is very easy to program with a large easy to read screen dimensions.