diff --git a/metronom.ino b/metronom.ino
index f6a369b..718812f 100644
--- a/metronom.ino
+++ b/metronom.ino
@@ -7,7 +7,7 @@ SAMD_ISR_Timer TasksISRs;
 void TasksHandler(void) { TasksISRs.run(); }
 
 
-const int COUNTDOWN = 240;
+const int COUNTDOWN = 600;
 const int PERIOD_MS = 1000;
 const int BUZZER_FREQ = 300;