It will beep or vibrate to warn your from Slow to Rapid and there are 3 LEDs: Level 1 (Weak), Level 2 (Medium), Level 3 (Strong), indicating the strength of detected signal.
It will beep or vibrate to warn your from Slow to Rapid and there are 3 LEDs: Level 1 (Weak), Level 2 (Medium), Level 3 (Strong), indicating the strength of detected signal.