OMA-VM500-3HT, OMA-VM500-3HT-B20 and OMA-VM500-3HT-B30
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Monitors Temperature, Relative Humidity and Power Status
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Programmable High and Low Limits for Temperature and Relative Humidity
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Program up to Four 20 Digit Phone Numbers
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Works with Telephone Pagers
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Easy-to-Follow Menu-Driven Programming Done Over the Phone