With 2 external probes, Lascar EL-WiFi-DTP+ measures temperature of environment from -40 to +125°C with typical accuracy of ±0.2°C. Unit can operate for up to 6 months on rechargeable internal lithium polymer battery. Logger's sensor collects data unattended while WiFi router sends data to FilesThruTheAir™ Cloud Storage Service, enabling users to manage and monitor sensors over Internet from any location. When alarms occur or if device needs attention, cloud can also send email alerts.