This product is an accessory, Can be connected to ProTemp S1 and ProTemp Plus. Please confirm that you already own a [ProTemp S1+ ChefsTemp 4-in-1 Charger] or [ProTemp Plus] before purchasing. Measures both the internal meat temperature and the ambient temperature close to the food (Important note: When the probe is connected to the ProTemp S1, the Ambient Temp displayed on the probe page in the App will reflect the ambient temperature measured by the ProTemp S1 Main Unit itself. The probe’s own local ambient temperature reading will not be displayed.) Made with stainless steel and heat resistant zirconia ceramic. Size: 95×28×7 mm (3.74×1.10×0.27 inch) Diameter: 5.5mm (0.217 inch) Max internal temp: 212°F (100°C) Max ambient temp: 662°F (350°C) Accurate: ±1°F (±0.5°C) The Mini Probe is ideal for measuring small and thin foods. The Mini Probe is ideal for measuring small and thin foods. ProTemp Plus Next-Gen Wireless Meat Thermometer Probe-Unlimited Range Bluetooth & WiFi Enabled Smart Digital Cooking Thermometer Grilling Smoker BBQ Oven Kitchen Rotisserie. Compatible with ProTemp S1 & ProTemp Plus. Please confirm you own either the (ProTemp S1+ 4-in-1 probe charger case) or (ProTemp Plus) prior to purchase.