Hosmart Half-Mile 4-Sensor Kit
A four-sensor battery kit with the longest published warranty here, for buyers who would rather swap AAs once a year than rely on solar.
Amazon $131.99$131.99
The Hosmart Half-Mile 4-Sensor Kit rates 3.7 among motion and beam sensors driveway alarms; the Dakota Alert DUAL-4k Plus rates 3.1 among vehicle-only sensors ones. The Hosmart Half-Mile 4-Sensor Kit costs $198 less ($131.99 vs $329.99).
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.
Dakota Alert DUAL-4k Plus
For a drive with steady traffic where knowing whether someone is coming or going matters, such as a farm or business entrance.
Amazon $329.99$329.99
Scores side by side
These two sit in different sensor type classes (motion and beam sensors and vehicle-only sensors), and each is scored against the reference points for its own class, so a rating says how well each does among its own sensor type peers. How we rank explains each factor.
| Factor weight | Hosmart Half-Mile 4-Sensor Kit | Dakota Alert DUAL-4k Plus |
|---|---|---|
| Overall rating | 3.7/5 | 3.1/5 |
| Wireless range 30% | 73 2,640 ft claimed wireless range | 100 1 mile claimed wireless range |
| Value 25% | 89 $33 per sensor ($131.99, 4 sensors) | 0 $329.99 per sensor ($329.99, 1 sensor) |
| Features 25% | 35 battery-powered receiver, per-sensor alerts, adjustable sensitivity | 25 relay or 12 V output, per-sensor alerts |
| Expandability 10% | 25 up to 4 sensors per receiver | 75 up to 16 sensors per receiver |
| Warranty 10% | 67 2-year warranty | 33 1-year warranty |
Specifications
| Hosmart Half-Mile 4-Sensor Kit | Dakota Alert DUAL-4k Plus | |
|---|---|---|
| Detection | ||
| Sensor type | PIR motion | Magnetic probe |
| Detection distance | 30 ft | - |
| Adjustable sensitivity | Yes | - |
| System | ||
| Wireless range | 2,640 ft (claimed) | 1 mile (claimed) |
| Sensors in box | 4 | 1 |
| Receivers in box | 1 | 1 |
| Sensors per receiver | Up to 4 | Up to 16 |
| Price per sensor | $33 | $329.99 |
| Alerts | ||
| Phone alerts (Wi-Fi) | No | No |
| Receiver power | Plug-in with battery backup | Plug-in |
| Relay or 12 V output | No | Yes |
| Per-sensor alerts | Yes | Yes |
| Power and build | ||
| Sensor power | AA batteries | CR123A batteries |
| Sensor battery life | About a year on 4 AA batteries (not included) | A year or more on three CR123A batteries (included) |
| Operating temperature | - | -30 to 120°F |
| Warranty | 2 years | 1 year |