RFXcom binding is not using Units
<?xml version="1.0" encoding="UTF-8"?>
-<thing:thing-descriptions xsi:schemaLocation="https://openhab.org/schemas/thing-description/v1.0.0 https://openhab.org/schemas/thing-description-1.0.0.xsd" xmlns:thing="https://openhab.org/schemas/thing-description/v1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bindingId="rfxcom">
-<thing-type id="temperaturehumidity">
-<supported-bridge-type-refs>
<bridge-type-ref id="bridge"/>
<bridge-type-ref id="tcpbridge"/>
<bridge-type-ref id="RFXtrx433"/>
<bridge-type-ref id="RFXrec433"/>
</supported-bridge-type-refs>
<label>RFXCOM Temperature-Humidity Sensor</label>
<description>A Temperature-Humidity device.</description>
-<channels>
<channel id="temperature" typeId="temperature"/>
<channel id="humidity" typeId="humidity"/>
<channel id="humidityStatus" typeId="humiditystatus"/>
<channel id="signalLevel" typeId="system.signal-strength"/>
<channel id="batteryLevel" typeId="system.battery-level"/>
<channel id="lowBattery" typeId="system.low-battery"/>
</channels>
-<config-description>
-<parameter required="true" type="text" name="deviceId">
<label>Device Id</label>
<description>Sensor Id. Example 56923</description>
</parameter>
-<parameter required="true" type="text" name="subType">
<label>Sub Type</label>
<description>Specifies device sub type.</description>
-<options>
<option value="TH1">THGN122/123, THGN132, THGR122/228/238/268</option>
<option value="TH2">THGR810, THGN800</option>
<option value="TH3">RTGR328</option>
<option value="TH4">THGR328</option>
<option value="TH5">WTGR800</option>
<option value="TH6">THGR918/928, THGRN228, THGN500</option>
<option value="TH7">TFA TS34C, Cresta</option>
<option value="TH8">WT260,WT260H,WT440H,WT450,WT450H</option>
<option value="TH9">Viking 02035,02038 (02035 has no humidity), Proove TSS320, 311501</option>
<option value="TH10">Rubicson</option>
<option value="TH11">EW109</option>
<option value="TH12">Imagintronix/Opus XT300 Soil sensor</option>
<option value="TH13">Alecto WS1700 and compatibles</option>
</options>
</parameter>
</config-description>
</thing-type>
</thing:thing-descriptions>
so the binding need to use units to use profile offset?