diff --git a/Connector.md b/Connector.md
index a880051..38562cb 100644
--- a/Connector.md
+++ b/Connector.md
@@ -1,7 +1,8 @@
 # Connector
 
-The connector is a RJ12 (6P6C, phone connector with all 6 positions populated)
-The interface uses RS-232 levels (±15V)
+The connector is a RJ12 (6P6C, phone connector with all 6 positions populated).
+The interface uses RS-232 levels (±5V), make sure your adaptor can handle this! (Some adaptors require higher voltages).
+TODO: Triple check RS-232 voltages.
 
 ## Pinout