The PINPOINT Calibration Thermometer, is a unique digital thermometer with an adjustable calibration feature. The PINPOINT Calibration Thermometer features a lab grade waterproof thermistor fiber tip with a mini-jack connection and 10-foot cable. Two standard AAA batteries (not included) will power the instrument for approximately 18–24 months of continuous duty. The meter display will signal when battery replacement is needed. Please contact us with any questions. 100% satisfaction guaranteed.