The All New Stick 2020 Stick 2018 Girth: 6 mm, Length: 93.7 mm Girth: 6.5 mm, Length: 105 mm Must be used with battery powered Charger 2020 Must be used with micro-USB powered Charger 2018 Deep-fry, Sous Vide and Dishwasher Safe Water Resistant Charger 2020 Charger 2018 Powered by 2 AAA batteries Powered by micro-USB cable Includes power button Doesn't include power button, always active Compatible only with The Stick 2020 Compatible only with The Stick 2018 Are you curious about the differences between The MeatStick and other meat thermometers? Go to this comparison page to find out the untold truth.