DT-2232 4-in-1 Digital Thermometer Light Humidity Sound Meter by Ruby Electronics Date first available at Amazon.com: May 28, 2009 1 used & new from $79.95 (Ranking is updated hourly. Visit the Hot New Releases in PDAs & Handhelds list for authoritative information on this product’s current rank.)

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#8: DT-2232 4-in-1 Digital Thermometer Light Humidity Sound Meter