This is an entirely wireless retrofit with +24-hour battery backup

Automatically generates customized temperature logs (downloadable)

Shows rolling seven-day temps displayed in web app with customizable date-range picker

Has customizable temperature alert settings for each freezer/cooler

Freezer door open alerts that can be set to specific timer for notifications

Wireless temperature sensors with 10-foot probe

Access to secured in-browser interface

Password-less PIN security access

24/7 notifications of alerts, if/when needed

Runs on a cellular network with up to 32,000 sensor messages held in memory if connection is lost (gateways also supports POE and Ethernet options)

Gateway with 4G LTE CAT-M1/NB2 cellular technology that's direct-to-cloud connection (1,200-foot range + 10 wall penetration)

Frequency-hopping spread spectrum

Over-the-air updates

256-bit Diffie-Hellman Key Exchange + AES-128 CBC for sensor data messages