H-B Frio Temp Calibrated Dual Zone Electronic Verification Thermometer; -40/70C (-40/158F) External, -40/70C (-40/158F) External, 37C Incubator Calibrations (B60210-0400)
</br></br>

</br></br></br></br></br></br></br></br></br></br>

</br></br></br></br></br></br></br></br></br></br>
<img src='http://ecx.images-amazon.com/images/I/41R9Jfi9f4L.jpg'></br>