Item Type: Vaccine Thermometer Material: Plastic + Propylene Glycol Internal Temperature Range: -4H-122H External Temperature Range: -58H-158H Display Resolution: 0.1 Sensor Buffer Solution: Food Grade Propylene Glycol Battery Information: Model: CR2450 Voltage: 3V Capacity: 520mAh Size: Approx. 24.5x5mm / 1.0x0.2in (Battery Not Included) Weight: Approx. 145g / 5.1oz1Vaccine thermometer, can record the temperature history to show the temperature when you left. 2The internal temperature range is ?4H?122H the external temperature range is ?58H?158H. 3The temperature sensor in propylene glycol solution bottle ensures accurate measurement. 4Temperature measurement is not affected by rapid temperature fluctuations caused by frequent door openings. 5When temperature rises or falls below set point, an alarm is issued to remind cooler to run at the correct temperature. 1 x Display (Battery Not Included) 1 x Sensor Cable