Minder TempMinder (R) Wall/ Table Mount -22 Deg F To 140 Deg F Thermometer Remote Transmitter RS-MX 03-1177

This white transmitter is used with TempMinder thermometer part numbers MRI-211MX, MRI-211MXW, MRI-213MX, MRI-213MXW, MRI-822MX, MRI-822MXW and MRI-823MXC. It's range is up to 229 feet.