... 110-240V DC5V) Operate time: 2-3 hours continuousSemidiameter of interception: 1-10 m(-75dBm) Antenna: built-in ... hospital etc.2. Places where using mobile phones is prohibited such as Service Station, Security Services, Military Units, Border ... Patrol and Drug Enforcement, Customs, etc. 101B mobile phone signal detector Semidiameter of interception ...