Thought I'd try this WonVon split screen. Dual cameras. Requires a 32gb Tf, micro sd card. Loop recording but you can save a section. I figured for $65 I'd try it because I want safety and I can take out sd card and put in my old LG G3 phone so to splice and compress , postwith simplicity. Used points soooo. Longevity is the concern. Still have to permanently install cameras. 3m tape comes with it. Screen is crystal clear but in pics looks grainy, I still have screen protector on in case I need to return. I may not mount back so I can adjust when doggie on rack. Thinking it thru.