Industrial-Grade Chip: Equipped with a high-quality DS18B20 chip, providing exceptional accuracy of ±0.9°F, ideal for demanding environments. Multi-Sensor System: Supports up to 30 sensors per hub, ensuring comprehensive coverage for large-scale monitoring needs. Long Battery Life: Utilizes low-power consumption technology for over 2 years of operation on a single full charge, minimizing maintenance. Flat and Thin Probe Cable: Specifically designed for tight refrigerator and freezer door seals, preventing air leaks and maintaining optimal temperatures. Instant Alerts: Stay informed with immediate audible, email, and app alerts upon temperature deviations, safeguarding your stored items. Protect your investments with our Essential Freezer Alarm. This robust monitoring solution features an industrial-grade chip for unparalleled accuracy, ensuring your freezers and refrigerators operate at peak efficiency. With support for multiple sensors, it caters to expansive monitoring requirements. Its durable design and long battery life make it a reliable choice for both commercial and residential applications. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.