Specifications Measuring range: Temperature Measuring range:-85℃~+150℃ ; Resolution:0.1℃/0.1°F Accuracy: Temperature: ±0.3℃(-20℃~+40℃); ±0.5C(others) Sensor type: External temperature sensors Memory: 32000 points (MAX) Logging interval: 10 seconds ~ 24 hours (10 minutes by default) Start mode: Button or software Stop mode: Button, software or stop when full Alarm thresholds: Temperature: up to 3 high limits and 2 low limits Dimensions: 115.5mmx47mmx16.2mm (LxWxH) Alarm type: Single/Cumulative Data transmission: USB port Report type: PDF format Battery: CR2450 3.0V single use lithium battery Battery life: 2 years (stored and used in normal temperature environment) Package includes 1 x Data Logger 1 x User Manual 1 x Calibration Certificate 1 x Quality Certificate