diff --git a/examples/lighting-app/nrfconnect/README.md b/examples/lighting-app/nrfconnect/README.md
index 4e9e588ecad546..ef8c94e125698d 100644
--- a/examples/lighting-app/nrfconnect/README.md
+++ b/examples/lighting-app/nrfconnect/README.md
@@ -219,7 +219,7 @@ opposite one.
 the test mode using the default configuration.
 
 **Button 4** — Pressing the button once starts the NFC tag emulation and
-enables Bluetooth LE advertising for the predefined period of time.
+enables Bluetooth LE advertising for the predefined period of time (15 minutes by default).
 
 **SEGGER J-Link USB port** can be used to get logs from the device or
 communicate with it using the
diff --git a/examples/lock-app/nrfconnect/README.md b/examples/lock-app/nrfconnect/README.md
index 2896b1ee03287c..54ec9c304c24ee 100644
--- a/examples/lock-app/nrfconnect/README.md
+++ b/examples/lock-app/nrfconnect/README.md
@@ -209,7 +209,7 @@ opposite one.
 the test mode using the default configuration.
 
 **Button 4** — Pressing the button once starts the NFC tag emulation and
-enables Bluetooth LE advertising for the predefined period of time.
+enables Bluetooth LE advertising for the predefined period of time (15 minutes by default).
 
 **SEGGER J-Link USB port** can be used to get logs from the device or
 communicate with it using the
diff --git a/examples/pump-app/nrfconnect/README.md b/examples/pump-app/nrfconnect/README.md
index 2a130566662f17..1c0991c032a4c0 100644
--- a/examples/pump-app/nrfconnect/README.md
+++ b/examples/pump-app/nrfconnect/README.md
@@ -159,7 +159,7 @@ opposite one.
 the test mode using the default configuration.
 
 **Button 4** — Pressing the button once starts the NFC tag emulation and
-enables Bluetooth LE advertising for the predefined period of time.
+enables Bluetooth LE advertising for the predefined period of time (15 minutes by default).
 
 **SEGGER J-Link USB port** can be used to get logs from the device or
 communicate with it using the
diff --git a/examples/pump-controller-app/nrfconnect/README.md b/examples/pump-controller-app/nrfconnect/README.md
index 2a130566662f17..1c0991c032a4c0 100644
--- a/examples/pump-controller-app/nrfconnect/README.md
+++ b/examples/pump-controller-app/nrfconnect/README.md
@@ -159,7 +159,7 @@ opposite one.
 the test mode using the default configuration.
 
 **Button 4** — Pressing the button once starts the NFC tag emulation and
-enables Bluetooth LE advertising for the predefined period of time.
+enables Bluetooth LE advertising for the predefined period of time (15 minutes by default).
 
 **SEGGER J-Link USB port** can be used to get logs from the device or
 communicate with it using the