Your link doesn't open for me, but I googled it and found mfr website. It's $699!!!!
I've been shopping for last 2 weeks, and you can get a nicer system for half the cost, but you get another monitor to put somewhere. And these work while underway. The GM above says it will be spotty underway.
But it would be nice to use the built in monitor.
2019 Silverado 2500 4WD, Cajun Red
Michelin LTX M/S, bed liner, Alum bed box
Boost mirror turn signal jumper
Trans cooler grill