--- /usr/share/X11/xorg.conf.d/50-wacom.conf
+++ /tmp/xorg.conf.d/50-wacom.conf
@@ -1,6 +1,6 @@
 Section "InputClass"
 	Identifier "Wacom class"
-	MatchProduct "Wacom|WACOM|Hanwang|PTK-540WL"
+	MatchProduct "Wacom|WACOM|Hanwang|PTK-540WL|ISD-V4"
 	MatchDevicePath "/dev/input/event*"
 	Driver "wacom"
 EndSection