... 2500MHz This type was developed specially for detecting the cellphone signal, like GSM800, GSM900,GSM1800,GSM1900,PHS1900, CDMA850, 3G ... ), leaking or not.3. Function Detecting the wireless signal sent by wireless detectaphone or tracker in objective place, ... <=0.05mw Detecting dynamic range: 70Db Indicate mode: 9 levels LED luminescence indication/voicing instruction Mini Signal Bug Detectors TG-007C ...