USB Temperature Data Logger, Temperature measuring range: -18-55°C, Temperature accuracy: ± 0.2°C, Humidity measuring range: 0-100% r.F, Accuracy: ± 1.5%, Storage capacity: >1,000,000 measured values and 500 measured values per measurement channel, Sample rate: 10 s - 24 hrs., Battery:. 2 x AAA 1.5 V, Battery life: >1 year, Start modes: immediate/push to start/delayed start/triggered by parameters, Alarm: Tone/LED/Display, Protection class: IP4X