TP972 Specification Temperature Range Internal Temperature 14˚F to 212˚F (-10˚C to100˚C) Ambient Temperature 14˚F to 572˚F (-10˚C to 300˚C) Tolerance ±1.8˚F (±1.0˚C) from 14 to 212°F (-10 to 100°C),otherwise ±2% Sensor Type NTC Transmission Range* Probe to Booster 460 feet (140m) with grill lid open in open ground, 14~40ft (4~12m) with grill lid closed. Booster to Smart device 600 ft (180m) in open ground Battery life Probe 36hours or more Booster 3 months or more Wireless Technology Bluetooth 5.2 Unit Size Probe Ø5(1)Diameter x 46(1) Length inches (Ø5.4 D x 106 L mm) Booster 6 3(1) Length x 2 5(3)Width x 1 Height inches (161.0L x 65.8W x25.8H mm) Power Probe 2.4V(1 x HTC4610Built-in lithium rechargeable battery) Booster 3.7V(1 x 14500 Built-in lithium rechargeable battery) · *The stated transmission range is based on tests at an ambient temperature of 77°F or 25°C without any obstructions or electromagnetic interference. Your range can vary depending on the number of obstructions and electromagnetic in your environment.