1 * 2700 mAh ER14505 Li-SOCL2 Battery Battery Life: Around 3 Years (25°C, 10 min Interval) Provide Highly Accurate and Stable DS18B20 Temperature Sensor Probe with High-resolution Temperature Probe is Detachable for Self-calibration Store Locally 2800 Records and Support Retransmission NFC Enabled IP67 Rated Advanced Features: Data Storage / Data Retransmission / Milesight D2D Controller((TH Version Only) Data Retrievability / Abrupt Temperature Change Alarm Equipped with indicator to indicate device status and threshold alarms (TH Version Only) Connector Type: 1 × 5-Pin M12 A-Coded Male Connector Measuring Range: -40°C ~ 125°C (-40°F ~ 257°F) Accuracy: Temperature Version- ± 0.5°C(-10°C ~ 85°C), ± 2°C(-40°C ~ -10°C, 85°C ~ 125°C) TH Version- ± 0.3°C(-40°C~ 0°C) ± 0.2°C(0°C~ 60°C) ± 0.5°C(60°C~ 125°C) Operating Temperature: TS201 Device: -30°C ~ 55°C (-22°F ~ 131°F) Relative Humidity: 0% to 95% (Non-condensing)