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, features and warranty. The Dakota Alert DCMA-4000 wins on wireless range and expandability. The Dakota Alert DCMA-4000 costs $62 less ($69.99 vs $131.99).
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 DCMA-4000
The cheapest way into a one-mile Dakota Alert system, for a long driveway where a chime in the house is enough.
Amazon $69.99$69.99
Which should you buy?
- Choose the Hosmart Half-Mile 4-Sensor Kit for value ($33 per sensor ($131.99, 4 sensors) vs $69.99 per sensor ($69.99, 1 sensor)), features (battery-powered receiver, per-sensor alerts, adjustable sensitivity vs per-sensor alerts) and warranty (2-year warranty vs 1-year warranty).
- Choose the Dakota Alert DCMA-4000 for wireless range (1 mile claimed wireless range vs 2,640 ft claimed wireless range) and expandability (up to 12 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 DCMA-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) | 59 $69.99 per sensor ($69.99, 1 sensor) |
| Features 25% | 35 battery-powered receiver, per-sensor alerts, adjustable sensitivity | 10 per-sensor alerts |
| Expandability 10% | 25 up to 4 sensors per receiver | 65 up to 12 sensors per receiver |
| Warranty 10% | 67 2-year warranty | 33 1-year warranty |
Specifications
| Hosmart Half-Mile 4-Sensor Kit | Dakota Alert DCMA-4000 | |
|---|---|---|
| Detection | ||
| Sensor type | PIR motion | PIR motion |
| Detection distance | 30 ft | 100 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 12 |
| Price per sensor | $33 | $69.99 |
| Alerts | ||
| Phone alerts (Wi-Fi) | No | No |
| Receiver power | Plug-in with battery backup | Plug-in |
| Relay or 12 V output | No | No |
| Per-sensor alerts | Yes | Yes |
| Power and build | ||
| Sensor power | AA batteries | 9 V battery |
| Sensor battery life | About a year on 4 AA batteries (not included) | A year or more on one 9 V battery (not included) |
| Operating temperature | - | -30 to 120°F |
| Warranty | 2 years | 1 year |