Reliable detector for temperature alarms and potential power outages. Connectivity: 4G LTE-M, 2G EGSM, Quadband. Adjustable temperature threshold between -35° and 70°. Logging with online insight and graphical representation. Precise temperature sensor with a 1-meter long cable. Connections: 2 digital temperature inputs, 2 NO/NC inputs (potential-free), 1 12-24 V DC input (external power supply). Power supply: 2 CR123 lithium batteries or external 12-24 V DC power supply (optional). The Mobeye ThermoGuard TwinLog is an extremely reliable and user-friendly temperature monitor. Once the temperature deviates from the set thresholds, an alarm notification is triggered. Additionally, it logs temperature values at a freely selectable interval and displays them in the online portal. The CML4255 features a reliable temperature sensor, optionally with a second one. It operates fully battery-powered or with external power supply. The built-in communication module can connect to the 4G LTE-M or 2G network. A Mobeye (M2M) SIM card is required for communication. The product includes a cost-effective "Multi-Provider" Mobeye SIM card, ensuring communication over the 4G LTE-M network. This also provides the device access to the Mobeye internet portal for optimal security and complete functionality. The 4G LTE-M network is very reliable, has strong penetration, and offers low energy consumption. The online-activated SIM card for the Mobeye CML4255 costs 8.00 EUR per month. This is a fixed amount based on fair use.