Data logger ideal for temperature mapping a fridge or freezer. Connects direct to a USB port. Works in temperatures from -35°C to +80°C and has a temperature accuracy of ±1°C.Gives precise measurement of temperature, which can identify the difference between safe vaccines and useless ones. Can hold up to 16,385 temperature readings. Logs the surrounding temperature at a user set parameter between 10 seconds to 12 hours. User programmable time period to suit individual needs. Visual flashing LED status indicators to warn for temperatures going above or below set parameters and low battery.