I use a Maverick ET 732 to monitor grate and food temps, another bonus is you can set alarms be it pit temps to high or low and a food internal temp alarm, I ordered mine on Amazon.
I grill 2 does have a not so far bluetooth distance however if you have an apple watch you can double the distance with staggering your phone in the middle. Temps will display on the watch for quick reads while in the pool holding a beer.