diff --git a/doc/adapter-api.txt b/doc/adapter-api.txt
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+Adapter hierarchy
+================
+
+Service		net.connman.iwd
+Interface	net.connman.iwd.Adapter [Experimental]
+Object path	/{phy0,phy1,...}
+
+Properties	boolean Powered [readwrite]
+
+			True if the adapter is powered.  If false, the
+			all of adapter's devices are powered down.
+
+		string Model [readonly, optional]
+
+			Contains the model name of the adapter, if available.
+
+		string Vendor [readonly, optional]
+
+			Contains the vendor name of the adapter, if available.