diff --git a/src/appointment.js b/src/appointment.js
index 078ac6b..7dd81bb 100644
--- a/src/appointment.js
+++ b/src/appointment.js
@@ -107,6 +107,8 @@ async function startBookWithNumbers(startNumber, endNumber, selectedStore, pathT
                         return
                     }
                     let segmentNumber = listToBook.length / devices.length;
+                    console.log("connected device number:" + listToBook.length)
+                    console.log("segmentNumber:" + segmentNumber)
                     for (let i = 0; i < devices.length; i++) {
                         startWithList(listToBook.slice(i * segmentNumber, segmentNumber * (i + 1)), devices[i], selectedStore, audioAnalyse, alertBeep);
                     }