YoLink YS1603-UC+YS7704-UC*4 Smart Door Sensor Starter Kit: 1/4 mile open-air range
For the parent who needs to know when the kids get home from school or the homeowner securing every first-floor window, the YoLink LoRa Smart Door Sensor Starter Kit provides more than just security—it offers daily peace of mind. You can place sensors on doors, windows, and even your refrigerator to get instant alerts if something is left open, preventing drafts or food spoilage without any monthly fees.
With its remarkable 1/4 mile open-air range, this system works reliably in basements, detached garages, and other spots where Wi-Fi often fails. The door left-open reminder is particularly useful; set a custom time limit, and you'll get a notification before a door ajar becomes a problem. Pair sensors directly with a siren for a localized alarm that functions even during internet outages, giving you a dependable, self-monitored setup.
Features
- 5 years battery life
- Door left-open reminders
- SMS, email, and app alerts
- Works with Alexa, IFTTT, Home Assistant
- No monthly fees
- Easy installation with QR code
- Device-to-device pairing
- 24/7 cloud server supervision
- 1/4 mile open-air range
General specs
- Brand: YoLink
- Model: YS1603-UC+YS7704-UC*4
- Seller: Amazon
- ID: B084X9D9HY
- Brand: YoLink
- Range: 0.25 miles
- Width: 5 inches
- Alerts: SMS, Text, Email, App Alerts
- Height: 2 inches
- Length: 9 inches
- Weight: 0.97 pounds
- Battery Life: 5 years
- Hub Included: Yes
- Product Type: Smart Door Sensor Starter Kit
- Mounting Type: 3M brand mounting tape
- Frequency Band: 900 MHz
- Number of Items: 5
- Batteries Included: Yes
- Additional Features: Door Left-Open Reminders, Device-to-Device Pairing, Cloud Server Device Supervision, Siren Alarm Pairing, Activity Tracking
- Internet Requirements: Wired ethernet port, Stable WiFi connection (2.4 GHz band)
- Platform Compatibility: IFTTT, Home Assistant
- Communication Technology: LoRa
- Smartphone Compatibility: Android, Apple
- Voice Assistant Compatibility: Alexa
- First listed by seller: 11/9/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Price History for seller Amazon
| Date | Price |
|---|---|
| 12/6/25 | $65.99 |
| 11/9/25 | $52.79 |
Shipping options
United States
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| Brand | YoLink | Gotrax | Linkind | ZSZMFH | Yunduo | LISASRING |
| Model | YS1603-UC+YS7704-UC*4 | K03 | LS10008142 | Coffee Sharing Pot | R26 | |
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| Price | $65.99 | $28.00 | $13.28 | $28.99 | $15.95 | $89.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Gshopper | Amazon |
| Update | December 9, 2025 | December 6, 2025 | December 6, 2025 | December 6, 2025 | July 25, 2024 | December 6, 2025 |
| Dimensions | 30, 82.042, 61.997 | 0.7, 13.7, 7.9 | <num_width>, <num_height>, <num_z> | |||
| Material | Calcium Chloride, Paper, Plastic | Glass | Titanium Alloy | |||