Twin TempSpike Plus TP972TP972 Specification Temperature Range Internal Temperature 14F to 212F ( 10C to100C) Ambient Temperature 14F to 572F ( 10C to 300C) Tolerance 1. 8F (1. 0C) from 14 to 212F ( 10 to 100C),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
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