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$8.32Below its usual priceOther options: $8.42 to $42.48

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Stable price for 9 tracked daystracked $25.91 · avg $26.02 · low $25.80 · checked 29 Oct 🛒 Buy on AliExpress →

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$8.32

SONOFF SNZB-04PR2 SenseGuard DW Gen2 Zigbee Door/Window Sensor, Active Security and Tamper Alerts

Name: SONOFF SNZB-04PR2 SenseGuard DW Gen2 Zigbee Door/Window Sensor, Active Security and Tamper Alerts
Brand: SONOFF
SKU: 1005011618338650
Price: 8.32 USD
Availability: InStock

98.6% positive feedback558 reviews 2k+ sold recently🏷️ SONOFF🏬 Sold by SONOFF Official Store✓ Picked

AliExpress buyer rating

The percentage shows how many AliExpress buyers rated this product positively. InstaShop does not edit or filter the rating.

✓ Selected for InstaShop by high positive feedback (88%+) and proven sales

✅ Compact design for discreet placement
✅ Tamper alert notification if sensor is removed
✅ Low power consumption via Zigbee protocol

👤 Smart home users looking for a reliable way to monitor entry points and trigger automation scenes.

Price updated 29 Oct 2026

Price range by option: $8.42 – $42.48

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Options (3):

ℹ️ Final price per option is set on AliExpress.

84/100⭐ RecommendedInstaShop Score

Rating

Sales volume

Discount

Computed by InstaShop from the product's real rating, sales volume and discount - an independent editorial signal, not a guarantee. How it is calculated

Secure your home with the SONOFF SenseGuard door and window sensor, featuring active tamper alerts for enhanced protection. It is the perfect choice for DIY security enthusiasts looking to automate lighting or monitor entry points through a reliable Zigbee smart hub.

Featured in: No-neutral smart switch and Zigbee hub: what should you buy for a home in Israel? (Also worth a look)

📋 Full specs, sizes, materials & detailed description - on the AliExpress product page →

🌍 International price: $8.32 (AliExpress's international listing). Shipping and any import taxes are shown at checkout. Details

Price historyLowest $8.29 (28.10) · full chart ↓

💡 Why buy · InstaShop analysis

👤 Best for: Smart home users looking for a reliable way to monitor entry points and trigger automation scenes.

🚫 Less suitable for: Users who do not own a Zigbee gateway or prefer a direct Wi-Fi connection without a hub.

🔎 Check before buying: Verify that your existing smart home hub supports the Zigbee 3.0 standard for full compatibility.

💰 Is the price good? 50% below the store's listed reference price.

Good to know:

Requires a compatible Zigbee hub to function
Battery life varies based on trigger frequency

⭐ Quality & trust: 98.6% positive feedback from 558 AliExpress buyer reviews. Updated daily.

🚚 Tracked shipping · 🔒 AliExpress Buyer Protection · Shipping, customs & returns →

What AliExpress buyers say

98.6%

positive feedback

558 reviews · 2k+ sold recently

The data comes from AliExpress and is updated daily. Full reviews, including buyer photos, are on the AliExpress product page.

See reviews on AliExpress →

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📈 Price history: is the discount real?

✓ Good price

Based on InstaShop's daily price tracking on AliExpress since 21.10.2026 · 9 measurements

Today's price

$8.32

checked 29.10

Lowest

$8.29

28.10

Average · 9 measurements

$8.36

21.10–29.10

We have tracked this product's price for 9 days, since 21.10.2026. The lowest was $8.29 (on 28.10.2026), the average $8.36 and the highest $8.41. Today's price, $8.32, is close to the average price.

All 9 measurements as a table

Date	Price	Change
29.10.2026	$8.32	↑ $0.03
28.10.2026	$8.29	↓ $0.12
27.10.2026	$8.41	↑ $0.02
26.10.2026	$8.39	–
25.10.2026	$8.39	–
24.10.2026	$8.39	↑ $0.06
23.10.2026	$8.33	–
22.10.2026	$8.33	↓ $0.03
21.10.2026	$8.36	–

The final price is set by AliExpress. · How we check fake discounts

🧾 From our price tracking

Price now: $8.32 · About usual (within 2% of the $8.36 average)
Last 30 days: low $8.29 · average $8.36
Tracked since: 21.10.2026 · 9 daily checks
Lowest price: $8.29 (28.10.2026)
Price drops: once
At the current price: 2 days ($8.32)
Listed discount: 50% - not real: the "original" price was never charged while we tracked it

Real data only: one price check per day on AliExpress, international listing, in US$.

🔍 In-depth analysis

The SONOFF SNZB-04PR2 SenseGuard DW Gen2 is a specialized Zigbee-based sensor designed for monitoring the open or closed status of doors and windows. As part of the second generation of Sonoff hardware, this model focuses on active security features, specifically including tamper alerts to notify you if the device is being interfered with. It integrates into a smart home ecosystem via the ZBBridge-P, allowing for remote monitoring and automation triggers through a dedicated mobile application. This sensor is a core component for those looking to build a DIY security system or automate lighting based on entry.

With nearly three thousand orders and a high buyer rating, the market reception for this specific model is exceptionally strong. It represents a functional upgrade over basic contact sensors by prioritizing security integrity. While the hardware is compact and designed for easy installation, its performance relies heavily on your existing Zigbee mesh network and the specific hub you use for connectivity.

✅ Pros

High buyer satisfaction score suggests consistent performance and reliability across thousands of units.
Includes active tamper alerts, a significant security upgrade over standard entry sensors.
Zigbee protocol ensures lower power consumption and less congestion on your home Wi-Fi network.
Massive order volume indicates a well-tested product with a mature manufacturing process.

Cons and cautions

Requires a separate Zigbee bridge to function, adding to the initial setup cost for new users.
The white plastic housing may stand out on darker door frames or modern industrial interiors.

From our data

3 variants on one listing: price and spec change with the option you pick

This analysis is written with an AI model from the product data (name, category, price, rating and orders), not from a hands-on test. How we choose and score

Who it's for: This device is ideal for smart home enthusiasts who already use the Sonoff ecosystem or a compatible Zigbee coordinator. It suits users who prioritize security features like tamper detection over simple open-close notifications.

Who should skip it: It is not suitable for users who do not own a Zigbee bridge or hub, as it cannot connect directly to Wi-Fi. It is also not intended for outdoor use where it would be exposed to rain.

🔎 Check before you buy

Confirm the specific battery type required for this Gen2 model and if it is included in the package.
Verify compatibility with third-party Zigbee coordinators like Home Assistant or Zigbee2MQTT if you do not use the ZBBridge-P.
Ask the seller about the maximum gap distance allowed between the sensor and the magnet for reliable triggering.
Check if the mounting adhesive is included or if you need to provide your own.

💰 Value verdict: Given the high volume of successful orders and the near-perfect rating, this sensor offers excellent value at its current discount. It is priced competitively for a Gen2 device that includes tamper protection, making it a safer investment than unbranded alternatives that lack active security features.

💡 Tips

Ensure the sensor and magnet are perfectly aligned during installation to prevent false 'open' reports.
Place the sensor on the stationary frame and the magnet on the moving door to protect the electronics from repeated slamming vibrations.
Check your Zigbee signal strength at the installation point before permanently adhering the device.

Questions about this product

Does this sensor work directly with my Wi-Fi router?

No, this is a Zigbee device and requires a compatible hub, such as the ZBBridge-P, to communicate with your network and phone.

What happens if someone tries to remove the sensor from the door?

The SNZB-04PR2 features tamper detection, which is designed to send an immediate notification to your app if the device is moved or opened.

Can I use this to turn on my hallway lights?

Yes, once connected to your hub, you can create an automation rule that turns on smart lights whenever the sensor detects the door has opened.

❓ Questions & Answers

What does it cost in US dollars?

$8.32 - AliExpress's international price at our latest check (29.10.2026). The exact amount in your currency, with shipping, is shown at AliExpress checkout.

Shipping and import taxes to my country?

Delivery to your address, its cost and time depend on the seller and your country; import duty/VAT depends on your country's rules (in the EU, the UK and Australia VAT/GST is usually collected at AliExpress checkout). All of it is shown before you pay.

Is this price tracked?

Yes. We have checked this listing's price 9 times since 21.10.2026 - see the price history and the tracking facts on this page.

Shipping, import taxes, returns & Buyer Protection - full answers →