diff --git a/Microphone-Transceiver.md b/Microphone-Transceiver.md
index 281652a..e58bcb2 100644
--- a/Microphone-Transceiver.md
+++ b/Microphone-Transceiver.md
@@ -1,7 +1,7 @@
 Originally the Microphone App was created providing only support to Narrow Band FM Transmitter & Receiver in Half Duplex operation, 
 like a walkie-talkie (two-way directional voice communication but one at a time). 
 
-But thanks to many great contributors , currently we are supporting multi voice analogue Modulation types : 
+But thanks to many great contributors , currently we are supporting multi voice analogue Modulation types in half duplex TX / RX : 
 * Narrow band FM (NBFM), 
 * Wide band FM (WBFM), 
 * Amplitude Modulation (AM),