Price range
$16
– $44
SwitchBot W4402000 Water Leak Detector
This water leak detector provides real-time notifications via Wi-Fi without requiring a hub, with high sensitivity that detects water as low as 0.5mm. It features a 100dB loud alarm, IP67 waterproof rating, and up to 2 years of battery life. Compatible with voice commands and smart home ecosystems like Amazon Alexa and Google Home, it offers app notifications and works on battery power with alkaline batteries included.
- 2 variants
- Real-time notifications via Wi-Fi without hub
- Dimensions: 2 variants
Price spread
~164%
Across new variants
Customer rating
1,496 ratings
Available variants (2)
Choose a variant, then open its detail page for seller-specific information.
3 Sensors Included
Amazon
Available to order
- Dimensions
- 32, 78, 29
- Item Weight
- 259
- Sensors Included
- 3
1 Sensor Included
Amazon
Available to order
- Dimensions
- 82, 85, 42
- Item Weight
- 68
- Sensors Included
- 1
Variant comparison
Compare prices, availability, and key variant differences in one table.
| Feature | 3 Sensors Included | 1 Sensor Included |
|---|---|---|
| Price | $43.59 | $16.49 |
| Updated | May 26, 2026 | Jun 3, 2026 |
| Availability | Available to order | Available to order |
| Dimensions | 32, 78, 29 | 82, 85, 42 |
| Item Weight | 259 | 68 |
| Sensors Included | 3 | 1 |
Amazon live offers
Offers updated
Top live offer
$16.49
New from
$16.49
Offer count
2+
| Seller | Condition | Price | Shipping | Updated | |
|---|---|---|---|---|---|
| Third-party seller FBA | New | $16.49 | Free shipping | 6/3/26 | View offer |
| Third-party seller FBA | New | $43.59 | Free shipping | 6/3/26 | View offer |
View all offers on Amazon
Overview
Compare SwitchBot W4402000 Water Leak Detector variants, pricing tiers and key differences.
Learn moreHow variants differ
- Dimensions
- Item Weight
- Sensors Included
Who each variant is for
- Start with your budget: the visible price spread across variants is about 164%.
Reviews
4.5 / 5
from 1,496 ratings
No written reviews yet
Product confidence
Reviews
There are no text reviews yet. If you have experience using this product, please leave a review. It will help other people decide whether this product is right for them.