The MobileMule 8150 is an nine channel Mobile DVR which can connect and record simultaneously up to 9 cameras (8 regular/AHD cameras and 1 forward facing IP camera). Footage records onto an included Western Digital 1TB hard drive with backup recording onto 1 SD card (sold separately) with a total storage capacity of 128GB. With built-in GPS, this high capacity DVR will record the vehicle's location and driving route as well as camera footage to provide the full picture from what's happening on the road. Perfect for fleets of trucks and buses, The MobileMule 8150 is vibration-proof and combines powerful functions together with a stable performance. *** The GPS+WiFi+4G option allows the user to use a SIM Card for live remote viewing. This model can also be connected to a WiFi hotspot. *** Note: A Western Digital 2.5" 1TB Hard Drive is included. This is the only drive compatible with this system. ***Note: To manually transfer footage off the SATA Hard Drive, use the RVS-SATA-USB Adaptor. ***Note: Software is only compatible with Windows Computers.