diff --git a/apps/README b/apps/README
index 35bd08b..4f7ca6e 100644
--- a/apps/README
+++ b/apps/README
@@ -31,3 +31,6 @@
                   After these changes are done, build the
                   grgsm_livemon_headless python code using the grcc
                   compiler.
+
+* grgsm_trx - a transceiver that together with Osmocom-BB (throught trxcon application)
+              forms a GSM mobile station. Currently it works on non-hopping channels only.
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