*battery included*. A perfect pocket temperature probe for homebrewing and BBQ! Check the temperature of your mash, whirlpool additions, or use it to check the internals of that fine-looking Lamb Roast on the bbq! With a range of-50°C to 300°C you will be hard-pressed not to get a temperature reading unless you live in an active volcano...Lava people or something.Specifications:Range: -50°C ~ 300°C / -58°F ~ 572°FResolution: 0.1°CTemperature Error: +-1°C (0~100°C)Power Supply: AG13 button battery x 1Functions:ON/OFF°C/°FHOLD