Camecho Vehicle Backup Camera 9 Inch 4 Split Monitor+ 4 Cameras with Front & Rear View Camera 18 IR Night Vision Waterproof Auto Camera with 2×33 ft and 2×65 ft Cables for RV, Trailer, Bus,Trucks

Fairly easy to install. Even though it’s “wireless,” everything still needs to be run to power, including the camera, but not a huge deal if you have a power source nearby. I ended up running the camera all the way to the power switch so I could use it anytime. Screen size is really nice compared to my old system. Overall this system works great so far. Would recommend.

Good camera works well
Good customer service

Review
It didn't work for me - I returned it - but it might work for you. I bought this for my truck having bought https://www.amazon.com/gp/product/B0855GMKMD/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1 (a rearview mirror dashcam) for my car and loved it - but the truck needs multiple cameras. I want this product to work for hitching up, and  rearview, and rear-view behind the trailer I'm pulling.,

good:
you can put a camera on the trailer and wire it through the hitch up, using two cables so you can disconnect the camera when you unhitch the trailer. Camera works through 90 ft of cable.  

cameras and connections are very rugged.

Not wifi - no flicker.single wire wiring

OK
The picture on rearview mirror dashcam is simply gorgeous. This one is poor by comparison, but it does the job.

only 1 camera (#2)has reversing guides (not adjustable). The camera is triggered by 12V applied to a signal wire, that you'd expect to a reversing light, but the wire you have to connect to is at the wrong end of the cable - near the monitor, not the reversing camera. Tough to wire up. 

 Bad
Cameras are huge. Lots of surface to get knocked. Mounting over the registration plate obscures the number.

Connections are half-inch thick. Tough to hide under the panelling if you need to.

The monitor feels 2 or 3 generations of technology behind the times. It is "clunky".  The buttons have no feedback. Takes seconds to turn on. no "on" light. Changing cameras causes the screen to blank for several seconds. It has lots of screen layouts but repeatedly pressing the Mode button to switch modes is tedious. 7 buttons, but all the function in one button. Bad user interface design. (compared to rearview mirror dashcam, which smoothly and instantly switches cameras by touch-screen).

Remote control is really cheap trash, and battery-not-included.

"mirrored" is a fixed function of each camera, so only two cameras can point backwards without a very confusing picture.

Almost no instructions, and the instructions that are there to apply to a slightly different product. (The diagram points to where there is a port on the product, but labels it a button). I have no idea what the port is for, or the one next to it) 

I have no idea how to mount the panel. There is a butterfly shaped metal bracket, with a screw connector, and a butterfly sticky, that appear to require a flat surface on the dashboard. My truck doesn't have a flat surface, let alone one where I want to mount the panel. But there's nothing on the monitor to screw the bracket into. May be there is under the covers, but there's no instructions on how to open it.

Ugly
One camera lost its red signal within minutes of connecting it. (see picture - CH3)
Monitor panel turned off on its own in the middle of the first journey, and would not come back on again.
Even though the panel would not turn on it drained the truck's dual batteries in 3 days.

Support was offered by Amazon and the seller, and no doubt these problems might have been fixed, but the product has too many deficiencies for me.

Good camera system for constant viewing, would not recommend for security recording. Picture quality is somewhere in between 480-720p, however for 150$ it is a fantastic system. Works great for my crawler / camping 4runner. Would recommend wiring the negative/ground wire to a switch so that you can keep this completely turned off as I feel like it might be a battery drainer somehow.. the only on/off button is on the screen itself however the camera still appear to be powered. The mount that came with the screen would shake like crazy under any little vibration, so I used a ball mount with a tablet grabber type arm mount.

I purchased this camera set for my Ford box truck. As most know a box truck has lots of blind spots. Especially making a left hand turn in an intersection. Where you can’t pull straight out. So I installed this camera system around my truck. One on each side, one on the back and one inside the box to see my load. It has been a great help especially in the city. The picture quality is good day and night. I would recommend this system.

I purchased to install on all four sides of my camper trailer. It works so good, especially in the split screen mode so I can view all four cameras at the same time. Easy to install and came with plenty of wire length. Highly recommend this.

The camaras work fine,,bote don't récord,,I los me money,,

Only drawback to this camera system is the mirroring. Two cameras are correct and two cameras are not. The camera mirroring is not performed by camera. The picture quality is good. There is no delay or lag. The display allows every combination possible for 4 cameras.