1 files changed, 5 insertions, 0 deletions
diff --git a/README b/README
index f034049..34c784c 100644
--- a/README
+++ b/README
@@ -18,3 +18,8 @@ Operations:
   m, max			get maximum brightness of the device.
   s, set VALUE			set brightness of the device.
 
+Valid values:
+  specific value		Example: 500
+  percentage value		Example: 50%
+  specific delta		Example: 50-
+  percentage delta		Example: 50%-