The cheapest four-camera wired kit here, for owners willing to run cables for a lag-free view.
Amazon $199.99The eRapta ER0202 Wired 7-inch 4-Camera rates 4.1 among wired RV backup cameras; the Rohent R12 Wireless 7-inch rates 3.9 among wireless ones. The Rohent R12 Wireless 7-inch costs $110 less ($89.99 vs $199.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.

A low-cost wireless kit with recording and the longest warranty among the cheap imports.
Amazon $89.99Scores side by side
These two sit in different type classes (wired and wireless), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | eRapta ER0202 Wired 7-inch 4-Camera | Rohent R12 Wireless 7-inch |
|---|---|---|
| Overall rating | 4.1/5 | 3.9/5 |
| Value 25% | 100 $50 per camera ($199.99, 4 cameras) | 74 $89.99 per camera ($89.99, 1 camera) |
| Resolution 20% | 62 1,080p camera | 62 1,080p camera |
| Field of view 10% | 50 field of view not published (neutral score used) | 50 field of view not published (neutral score used) |
| Monitor 10% | 47 7 in monitor | 47 7 in monitor |
| Expandability 5% | 100 takes up to 4 cameras | 100 takes up to 4 cameras |
| Weatherproofing 10% | 100 IP69 camera | 100 IP69 camera |
| Features 10% | 35 records to a memory card | 35 records to a memory card |
| Signal 5% | 100 wired video link | 100 320 ft on-vehicle range (maker claim) |
| Warranty 5% | 50 2-year warranty | 100 3-year warranty |
Specifications
| eRapta ER0202 Wired 7-inch 4-Camera | Rohent R12 Wireless 7-inch | |
|---|---|---|
| Cameras | ||
| Cameras included | 4 | 1 |
| Cameras supported | 4 | 4 |
| Camera resolution | 1,080p | 1,080p |
| Night vision | Infrared | - |
| Waterproof rating | IP69 | IP69 |
| Camera power | Vehicle 12 V | Vehicle 12 V |
| Microphone | No | No |
| Monitor | ||
| Size | 7 in | 7 in |
| Resolution | 1920x1080 | - |
| Touchscreen | No | No |
| Recording | Yes | Yes |
| Input voltage | 12-24V | - |
| Link | ||
| Link | Wired | Wireless |
| On-vehicle range | - | 320 ft (maker claim) |
| Open-air range (not scored) | - | 980 ft (maker claim) |
| RV prewire fit | No | No |
| Support | ||
| Warranty | 2 years | 3 years |