EST-101C cellphone signal detector 1.detect the CDMA,GSM,DCS,PHS,3G signal 2.Detector range: 10m 3.color:blue ... EST-101C cellphone signal detector 1. Introduction of product (1). portable cellphone signal ... S,PHS(3G) within 1-10m. It will alarm through vibration and radiation when it detect the cellphone signal, ... the mobile phone forbidden; EST-101C cellphone signal detector