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. The eMACROS Pro3 Wi-Fi 2-Sensor Kit wins on features. The eMACROS Pro3 Wi-Fi 2-Sensor Kit costs $42 less ($89.99 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.
eMACROS Pro3 Wi-Fi 2-Sensor Kit
The cheapest way to get driveway alerts on your phone with two solar sensors, for a home on 2.4 GHz Wi-Fi.
Amazon $89.99$89.99
Which should you buy?
- Choose the Hosmart Half-Mile 4-Sensor Kit for value ($33 per sensor ($131.99, 4 sensors) vs $44.99 per sensor ($89.99, 2 sensors)).
- Choose the eMACROS Pro3 Wi-Fi 2-Sensor Kit for features (phone alerts over Wi-Fi, solar-charged sensor, adjustable sensitivity vs battery-powered receiver, per-sensor alerts, adjustable sensitivity).
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 | eMACROS Pro3 Wi-Fi 2-Sensor Kit |
|---|---|---|
| Overall rating | 3.7/5 | 3.5/5 |
| Wireless range 30% | 73 2,640 ft claimed wireless range | 73 2,600 ft claimed wireless range |
| Value 25% | 89 $33 per sensor ($131.99, 4 sensors) | 76 $44.99 per sensor ($89.99, 2 sensors) |
| Features 25% | 35 battery-powered receiver, per-sensor alerts, adjustable sensitivity | 50 phone alerts over Wi-Fi, solar-charged sensor, adjustable sensitivity |
| Expandability 10% | 25 up to 4 sensors per receiver | 50 sensor limit not published (neutral score used) |
| Warranty 10% | 67 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Hosmart Half-Mile 4-Sensor Kit | eMACROS Pro3 Wi-Fi 2-Sensor Kit | |
|---|---|---|
| Detection | ||
| Sensor type | PIR motion | PIR motion |
| Detection distance | 30 ft | 30 ft |
| Adjustable sensitivity | Yes | Yes |
| System | ||
| Wireless range | 2,640 ft (claimed) | 2,600 ft (claimed) |
| Sensors in box | 4 | 2 |
| Receivers in box | 1 | 1 |
| Sensors per receiver | Up to 4 | - |
| Price per sensor | $33 | $44.99 |
| Alerts | ||
| Phone alerts (Wi-Fi) | No | Yes |
| Receiver power | Plug-in with battery backup | Plug-in |
| Relay or 12 V output | No | No |
| Per-sensor alerts | Yes | - |
| Power and build | ||
| Sensor power | AA batteries | Solar, rechargeable |
| Sensor battery life | About a year on 4 AA batteries (not included) | Built-in solar panel and rechargeable battery |
| Warranty | 2 years | - |