Uses USIM card, and supports WCDMA 3G network Two-way intercom and on-site shouting function Built-in 2.0 ... ,enables two-way intercom and on-site shouting functionRemote control by mobile message, which is confidential and safeSupports SMS alarm, video call alarm, and ... ( infrared light is off) 2.0 MP WCDMA 3G Video Alarm Camera With Two Way Intercom Function