Photo 1 of MarCELL PRO - Professional Level Remote Temperature, Humidity & Power Monitor - No WiFi Needed (Uses AT&T Network) - RV, Network Room, Freezer, Home - Instant Phone Call Alerts - Made in The USA

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Photo 1 of MarCELL PRO - Professional Level Remote Temperature, Humidity & Power Monitor - No WiFi Needed (Uses AT&T Network) - RV, Network Room, Freezer, Home - Instant Phone Call Alerts - Made in The USA