Extech RH200W-T Wireless Hygro-Thermometer Transmitter for RH200W</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>For Use with RH200W Big Digit Multi-Channel Wireless Hygro-Thermometer</li><li>Transmitter LED flashes to indicate normal operation</li><li>Transmitters can be mounted up to 98ft (30M) from the base station</li><li>Up to 8 transmitters can be wirelessly connected to the base</li></ul></div></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/31T2H%2BzYr6L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31PVYKvoZwL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31x9kLvcHeL.jpg' noproxy></br>