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 Smart Vehicle Sensor 4000 rates 3.5 among vehicle-only sensors ones. The Hosmart Half-Mile 4-Sensor Kit costs $168 less ($131.99 vs $299.99).
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 Smart Vehicle Sensor 4000
Dakota Alert’s buried vehicle probe with phone alerts, for a property where you want to know about every car without false alarms from wildlife.
Amazon $299.99$299.99
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 Smart Vehicle Sensor 4000 |
|---|---|---|
| Overall rating | 3.7/5 | 3.5/5 |
| 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 $299.99 per sensor ($299.99, 1 sensor) |
| Features 25% | 35 battery-powered receiver, per-sensor alerts, adjustable sensitivity | 60 phone alerts over Wi-Fi, relay or 12 V output, per-sensor alerts, adjustable sensitivity |
| 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 Smart Vehicle Sensor 4000 | |
|---|---|---|
| Detection | ||
| Sensor type | PIR motion | Magnetic probe |
| Detection distance | 30 ft | 10 ft |
| Adjustable sensitivity | Yes | 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 | $299.99 |
| Alerts | ||
| Phone alerts (Wi-Fi) | No | Yes |
| 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) | Over a year on three CR123A batteries (included) |
| Operating temperature | - | -30 to 120°F |
| Warranty | 2 years | 1 year |