The circuit can detect both the incoming and outgoing calls, SMS and video transmission even if the mobile phone is kept in the silent mode. The moment the bug detects RF transmission signal from an activated mobile phone, it starts sounding a beep alarm and the LED blinks. The alarm continues until the signal transmission ceases.
ارجو المساعدة ف فهم الدائرة وكيفية زيادة مدي الكشف والاشارات المستقبلة