From The Manufacturer
SH66A Thermistor, 3 zone, without Probe, -40 to 300°F (and C) ±0.3 F or ±0.5% reading (whichever is greater) temperature accuracy, 9v battery

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| Manufacturer | Cooper-Atkins |
| Model Number | SH66A-ONLY-E |
| Weight | 15.04 oz |