AUTO-VOX Wireless Backup Camera Kit: 7.2" Monitor, Dual Solar 5 Cams, Suction Mount – Flexible Placement for RV, Horse Trailer, Boat Trailer & Campsite Security

Why it's worth it

This AUTO-VOX kit pairs two solar cameras with a 7.2-inch monitor that shows both feeds side by side. If you tow a horse trailer, an RV or a boat, watching the road behind and the cargo at the same time is the whole point.

Split-screen is the feature you can't get anywhere else here. Every other kit shows you one view. This one shows two at once on a 7.2-inch 1080p monitor, which means you can watch the lane behind your trailer and the animals inside it without toggling. For anyone hauling livestock, that's not a convenience — it's the reason to buy.

Both cameras are solar, so neither needs wiring, and that's what makes a trailer practical. A trailer isn't wired for a camera, and running cable from a tow vehicle to a boat trailer is miserable work. Stick a solar camera on the back, stick another inside, and you're done. Detach the trailer and nothing breaks.

From our review of 7 parking sensors and reversing aids, by Ben Carter, Tech Editor

What we like

• +Split-screen is the feature you can't get anywhere else here
• +Both cameras are solar, so neither needs wiring, and that's what makes a trailer practical
• +The suction mount is more flexible than it sounds
• +If your towing problem is hitching rather than monitoring, this still helps — a camera aimed at the hitch turns a two-person job…

What to know

• –This is the most expensive kit here and the least proven
• –Two solar cameras mean two batteries to think about
• –A suction-cup monitor on the dash will fall off eventually — heat, dust and vibration all work against it