SONOFF
SONOFF 4CHPROR3
Smart relay switchWi-Fi
$26.21Listed equipment price · lowest price out of stockListing observed 2026-11-07
SONOFF
SONOFF DW2-RF 433 MHz Door / Window Sensor
Door / window contact sensorRF 433 MHz
Retailer listing · 1 offer collected
ITEAD / SONOFF$4.99
Listed equipment price
In stock when checkedView retailer offer Price observation: 2026-11-07 · USDSHOP THE SAME EQUIPMENT
Compare retailer prices.
One exact price collected
1 retailer · 1 offer collected. Prices exclude shipping, tax, and installation. Compare the stock, condition, and date for each offer.
| Retailer | Listed price & quantity | Availability & condition | Observed | Shop |
|---|---|---|---|---|
| ITEAD / SONOFFStore policies & support | $4.99Single item | In stock when checkedCondition not recorded | Source date 2026-11-07 | View offer |
WHAT WE ACTUALLY OBSERVED
Prices have a history.
Observations keep their original source dates and purchase scopes. Historical lows are separate from current availability. Unpriced and configuration-dependent offers are never treated as exact-price lows.
ITEAD / SONOFF · Single item · price & stock history
Open to load this exact offer’s dated source observations.
Standards evidence.
No exact-model certification record has been reviewed for this listing in our evidence collection. This does not establish whether the product is certified.
How to verify the model and scopeTHE DETAILS THAT MATTER
A clearer look at the specifications.
| Specification | Listed value | Source |
|---|---|---|
| Device function | Door / window contact sensor | Manufacturer documentationReviewed 2026-11-07 |
| Device communication protocols | RF 433 MHz | Manufacturer documentationReviewed 2026-11-07 |
| Device power source | 2 × AAA 1.5 V batteries | Manufacturer documentationReviewed 2026-11-07 |
| Door / window contact sensing | Yes | Manufacturer documentationReviewed 2026-11-07 |
| Separate gateway hub required for basic functions | YesRequires a compatible RF433 receiver/bridge for connected functions. RF sensor does not join Zigbee. | Manufacturer documentationReviewed 2026-11-07 |
| Stated compatible equipment | SONOFF RF BridgeR2 | Manufacturer documentationReviewed 2026-11-07 |
KEEP EXPLORING
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