Too many sensors are defective. The monitor has to be tethered to the charger. Battery life SUCKS !! THE FREESTYLE 2 APP IS GARBAGE ! DEFINITELY A STEP BACKWARDS COMPARED TO THE ORIGINAL UNIT. I WISH MY INSURANCE PAID FOR THE COMPETITOR. There are enough negative reviews that this will be reported, and a class action should follow. I can't believe they would actually leave such junk on the medical market.