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
A one-mile motion kit with a pocket receiver, for people who spend the day outside or in a workshop rather than by a wall chime.
- PIR motionSensor
- 1 mile (claimed)Wireless range
- 1Sensors in box
- Portable receiverAlerts
Price checked November 7, 2026. As an Amazon Associate we earn from qualifying purchases.
- Portable receiver goes with you to the shop, barn or yard
- Vibrate alert and a screen that shows which of 16 zones tripped
- Claimed one-mile range
- Receiver needs charging about once a week
- No relay output or phone alerts
- Warranty is not published for this kit
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its sensor type. How we rank explains each one.
Specifications
| Model number | MTPR-4000 |
|---|---|
| Detection | |
| Sensor type | PIR motion |
| Detection distance | 100 ft |
| System | |
| Wireless range | 1 mile (claimed) |
| Sensors in box | 1 |
| Receivers in box | 1 |
| Sensors per receiver | Up to 16 |
| Price per sensor | $79.99 |
| Alerts | |
| Phone alerts (Wi-Fi) | No |
| Receiver power | Portable, rechargeable |
| Relay or 12 V output | No |
| Per-sensor alerts | Yes |
| Power and build | |
| Sensor power | 9 V battery |
| Sensor battery life | A year or more on one 9 V battery |
| Operating temperature | -30 to 120°F |
Alternatives in this sensor type
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 $289.99The cheapest way into a one-mile Dakota Alert system, for a long driveway where a chime in the house is enough.
Amazon $69.99Compare
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