diff --git a/PLAY.md b/PLAY.md
index 13245f01..fab42d55 100644
--- a/PLAY.md
+++ b/PLAY.md
@@ -40,4 +40,6 @@ NetGuard does not even require the internet permission.
 
 NetGuard is possibly the first free and open source no-root firewall for Android.
 
-Read more: http://forum.xda-developers.com/showthread.php?t=3233012
+Most of these features are the result of sending selected traffic to a sinkhole, instead of filtering all internet traffic. This means that advanced features, like address based filtering (needed for hosts blocking), traffic logging, and on-demand configuration, are not possible. Routing selected traffic into a sinkhole relies on the VpnService API introduced in Android 5.0 (Lollipop).
+
+For up to date info on device compatibility, questions and answers please read more here: http://forum.xda-developers.com/showthread.php?t=3233012