... : 1-10m 2.frequency range:GSM,GSM,DCS,PHS and 3G signal ET101B Portable mobile phone detector1. TechnologyDetects wideband:a. can ... ) 1710MHz~1785MHzd. can detects the RX frequency( PHS/3G ) 1920MHz~1980MHz(2100-2200) Antenna inside*signal detecting range:Radius 1~10M. (It ... by the earphone.*Working temperature:-40°C ~ +55°C*Antenna: Inner antenna*Working power:Power in : AC 110~240V 50/60Hz,Power ...