diff --git a/README.md b/README.md
index 0c278798..8f3e959e 100644
--- a/README.md
+++ b/README.md
@@ -11,9 +11,6 @@ After installation the Core works as in the Video
 Here is the [D6Flasher](https://play.google.com/store/apps/details?id=com.atcnetz.ble.readwrite) on Google Play-store
 with the Flasher it is Possible to flash the Created firmware over the air, please view the Youtube Video.
 
-You can buy the Tracker on Gearbest for as Cheap as 5$ [https://www.gearbest.com/smart-watches/pp_1232618.html?wid=1433363&lkid=52058797](https://www.gearbest.com/smart-watches/pp_1232618.html?wid=1433363&lkid=52058797)
-Coupon: GB0722MPOW
-
 ## Installing
 
 ### Board Manager
diff --git a/cores/nRF5/delay.c b/cores/nRF5/delay.c
index c2b1f4e6..0867f028 100644
--- a/cores/nRF5/delay.c
+++ b/cores/nRF5/delay.c
@@ -65,7 +65,7 @@ void RTC1_IRQHandler(void)
     (void)dummy;
 #endif
 
-  overflows = (overflows + 1) & 0xff;
+  overflows = (overflows + 1);
 }
 
 #ifdef __cplusplus