... range:GSM,GSM,DCS,PHS and 3G signal ET101B Portable mobile phone detector1. TechnologyDetects wideband:a. can detects th RX frequency(CDMA ... light(Blue)& RF detecting light(Red).*When it find the mobile phone signal, the red light will be on, much nearer to ... the mobile phone, more lights will be on, and show the signal’s ...