Tripp Lite ENVIROSENSE Environmental Sensor for use with SNMP / Web Cards<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Environmental sensor^Allows remote temperature and humidity monitoring in network environments^Provides monitoring and control of alarm， security and telecom devices through a dry-contact interface^For use with Tripp Lite SNMP/Web Cards </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ilT34tXsL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/511-TK49%2BaL.jpg" noproxy>