Uses USIM card, and supports WCDMA 3G network Two-way intercom and on-site shouting function Built-in 2.0 ... detect after setting defense.Built-in MIC and speaker,enables two-way intercom and on-site shouting functionRemote control by mobile message ... house, school, and stores, and can also monitor the mobile car, steamboat, and the train Technical parametersPower adaptor:Input 100V~240V ...