I use this device with up to four probes including one ambient temperature probe. When cooking a roast I still two probes in the meat and one for ambient. I used it the other day when heating up a pie. It connects without any problem using bluetooth. It changes the way you cook from 'time based' to 'temperature based'. Get the meat to the right temperature, in an over set to the right temperature, and you know it is cooked, no guessing or testing. The app is easy to use, you can set temperature settings on individual probes, in case you are cooking a few things at the same time (e.g heating a pie and cooking a roast). Recommended