... alarm 3. back-stage command system 3G mini Mobile DVR Recorder Main Features:1. 3G CommunicationWCDMA/HSPA, 850/1900/2100MHz, ... .8MemoryA micro SD POP socket interface,Maximum support 32G 9USBOne USB interface,Support PC communication10GPSBuilt-in GPS,Support for video and ... passed CE & ROHS certificates.3.Our products are Police camera recorder, watch camera, HD China 3G DVR, pen camera and so on ...