The AirProbe3 works in conjunction with your Tappecue Touch and/or Smartphone in order to provide you with the most optimal cooking experience for rotisserie smokers, pressure cookers, air fryers, and more. The AirProbe3 is safe to use in Dishwashers, Pressure Cookers and Air Fryers and has a waterproof rating of IP67. It's a dual sensor probe that gives readings of the internal temperature of the meat and the chamber temperature. 2 hour charge time / charge lasts 48 hours or more! 5mm Diameter probe. You can use up to four AirProbes at a time with each probe identified with a separate color: green, red, black or blue. The default color is Green and whenever you use more than one at a time, you will have to change the color of the other probes so that the App can recognize each probe individually. You can make changes to your probe color any time in the Tappecue Mobile App.