Our Predator Precision Micro DVR was developed as a result of our Combo Recorder, which was developed as a recording solution for the N-Vision Halo Thermal. It is the same high quality DVR in D1 (720) resolution, with audio. This is an excellent choice for people who want to be able to record with their N-Vision Halo, but want to run their own battery supply, or have a battery pack already. The USB will plug into any external power supply intended to power the Halo. A Samsung micro SD card is also included.