I bought this for my Bolt and installed it myself. I posted details of the installation and a review in the Bolt forum:

https://www.chevybolt.org/threads/gm-19433432-dash-cam-by-echomaster-kit-advantages-and-installation.47599/

Post #9 and #10 are my installation, which should be similar to installing in the EQEV (depending on how to gain access to the 12v DC power supply in the EQ).

Post #11 is the review. Hope this helps!

 

I posted details of the installation and a review in the Bolt forum:

Lot's of pictures, good job. It's powered by the OBD2 port, I haven't seen that before.

 

No one ever takes good pics of their routing job in the roof area :<

 

@paddypods, does it accept SD cards larger than 32 GB?

 

does it accept SD cards larger than 32 GB?

The user manual (PDF) is silent, Obermd

 

Amazon.com: SanDisk 256GB MAX Endurance microSDXC Card with Adapter for Home Security Cameras and Dash cams - C10, U3, V30, 4K UHD, Micro SD Card - SDSQQVR-256G-GN6IA : Electronics

Buy SanDisk 256GB MAX Endurance microSDXC Card with Adapter for Home Security Cameras and Dash cams - C10, U3, V30, 4K UHD, Micro SD Card - SDSQQVR-256G-GN6IA: Micro SD Cards - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

That's the one I got for myself. Cars get hot inside and you'll want something that can take the heat.
I also stick to well-known brands and make sure they're sold by and shipped from Amazon, not a third party.
I'd also consider these as well:

Amazon.com: Samsung PRO Endurance 256GB MicroSDXC Memory Card with Adapter for Dash Cam, Body Cam, and Security Camera, Class 10, U3, V30 (‎MB-MJ256KA/AM) : Electronics

Amazon.com: Samsung PRO Endurance 256GB MicroSDXC Memory Card with Adapter for Dash Cam, Body Cam, and Security Camera, Class 10, U3, V30 (‎MB-MJ256KA/AM) : Electronics

www.amazon.com

Amazon.com