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 is the better driveway alarm overall, rated 3.7 to 3.5. The Hosmart Half-Mile 4-Sensor Kit leads on value and warranty. The Dakota Alert Smart Break Beam 4000 wins on wireless range, features and expandability. The Hosmart Half-Mile 4-Sensor Kit costs $158 less ($131.99 vs $289.99).
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 Break Beam 4000
A solar break-beam with phone alerts, for covering a wide gateway or property line that a single motion sensor can’t reach across.
Amazon $289.99$289.99
Which should you buy?
- Choose the Hosmart Half-Mile 4-Sensor Kit for value ($33 per sensor ($131.99, 4 sensors) vs $289.99 per sensor ($289.99, 1 sensor)) and warranty (2-year warranty vs 1-year warranty).
- Choose the Dakota Alert Smart Break Beam 4000 for wireless range (1 mile claimed wireless range vs 2,640 ft claimed wireless range), features (phone alerts over Wi-Fi, relay or 12 V output, solar-charged sensor, per-sensor alerts vs battery-powered receiver, per-sensor alerts, adjustable sensitivity) and expandability (up to 16 sensors per receiver vs up to 4 sensors per receiver).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every motion and beam sensors driveway alarm; a clear win is highlighted. How we rank explains each one.
| Factor weight | Hosmart Half-Mile 4-Sensor Kit | Dakota Alert Smart Break Beam 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) | 1 $289.99 per sensor ($289.99, 1 sensor) |
| Features 25% | 35 battery-powered receiver, per-sensor alerts, adjustable sensitivity | 65 phone alerts over Wi-Fi, relay or 12 V output, solar-charged sensor, 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 Smart Break Beam 4000 | |
|---|---|---|
| Detection | ||
| Sensor type | PIR motion | Infrared break beam |
| Detection distance | 30 ft | 300 ft beam spacing |
| 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 | $289.99 |
| 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 | Solar, rechargeable |
| Sensor battery life | About a year on 4 AA batteries (not included) | Battery operated, charged by two solar panels on each beam |
| Operating temperature | - | -30 to 120°F |
| Warranty | 2 years | 1 year |