If the game time fails to stop when the whistle blows at the start of the game, perform the following analysis:
1. Check the indicator light on the electronic whistle receiver
The red indicator light flashes in standby mode.
When the whistle blows and the receiver successfully picks up the signal, the middle indicator light will briefly turn blue, then off, and return to flashing red.
2. Check the electronic whistle communication host
When the electronic whistle receiver communication host is turned off, the LCD screen displays as follows:
When the electronic whistle receiver communication host is turned on, the LCD screen shows the battery level of the electronic whistle receiver.
When the whistle blows, the LCD screen briefly displays the received signal strength. After 2–3 seconds, it returns to showing the battery level of the electronic whistle receiver.
3. Check the Ultra Score interface
When the electronic whistle communication host is successfully connected to the KS‑MONSTER, an electronic whistle icon will appear in the lower‑left corner of the software.