Note: For use in North America The RTU5026 (temperature monitoring) temperature alarm can be configured for high and low temperature alarms based on the application. Once the current temperature reaches the alarm threshold, an alarm text message and phone call will be sent to the user. Users can call the device from an authorized number; the device will automatically reject the call and immediately send a status text message to the caller. Users can also query the current status via SMS commands. The device can be set to send status text messages to the primary user at a fixed time daily or periodically. It supports Modbus RTU and Modbus TCP protocols for connecting to cloud platforms, allowing real-time monitoring of current status over the network. This series of products can be used for temperature monitoring, humidity monitoring, 4-20mA or 0-5V analog signal monitoring, DC voltage monitoring, and three-phase and single-phase power outage monitoring. It is suitable for classrooms, public spaces, hospitals, train stations, food warehouses, offices, factories, libraries, laboratories, and any other location where monitoring is required and supported. Power supply: 9-36V DC Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Voltage: AC100-240V Color: As Shown Material: Metal Package Contents: 1 * RTU5026 host 1 * Antenna 1 * Power cord