Wide Temperature Measurement Range Food: 14ºF to 212ºF / -10ºC to 100ºC. Bbq Ambient: 14ºF to 571ºF / -10ºC to 300ºC. High Accuracy Food: +-2ºF (+-1.0ºC) Bbq Ambient: +-2ºF (+-1.0ºC) from 14ºF to 212ºF / -10ºC to 100ºC, Otherwise: +-2% Long distance, Easy to use - Bluetooth system design is convenient to measure the temperature wirelessly, upto 70 meters wireless remote transmission, with great signal and stability. Waterproof Structure - With IPX7 certification, can meet daily usage needs.(Do not soak it in water) Strong Internal Magnet - With a strong internal magnet on the backside, the thermometer can be placed vertically on the refrigerator or other metal surface. Power/Battery Probe: 2.4V (Built-in lithium rechargeable battery) Booster: 3.7V (Built-in lithium rechargeable battery) Materials Probe: Food safe stainless steel 304 Housing: Eco-friendly ABS plastic