Eufy Baby S340 Smart Sock Monitor
The Eufy Baby S340 Smart Sock monitors your infant’s heart rate and oxygen levels continuously in a soft, breathable sock design. It pairs with a small hub and app for real-time alerts and historical trends, giving parents peace of mind without constant checking. The sock is washable, adjustable for newborn to 12-month sizes, and uses secure, low-power wireless connection. Lightweight and comfortable, it’s built for safe overnight monitoring and daytime naps.
Specifications
| Measured Metrics | Heart rate (bpm), SpO2 (oxygen saturation), motion |
| Sock Material | Breathable knit fabric (washable insert) |
| Battery Life (Sock) | Up to 24 hours (continuous), rechargeable |
| Hub Connectivity | Bluetooth Low Energy with encrypted link / local hub |
| Age Range | Newborn to 12+ months (adjustable sizes) |
| Weight (Sock Module) | Approx. 12 g |
| Dimensions (Hub) | 60 x 60 x 20 mm |
| App Compatibility | iOS 13+ / Android 8.0+ |
| Certifications | CE, RoHS, Medical device classification pending |
| Material Safety | Hypoallergenic fabrics, phthalate-free |
| Brand | Eufy |
| SKU | 311 |
Reviews
The soft fabric and secure fit are brilliant — our 5-week-old kept it on during naps. App notifications are timely and not intrusive.
This shampoo is a staple during bath time for my 9-month-old. It rinses out easily and the mild fragrance is perfect for sensitive skin.
Love the natural vibe of Burt's Bees; our 12-month-old's hair feels glossy.
As a parent of a 12-month-old, I appreciate the gentle formula. The 350 ml bottle lasts a long time and is easy to handle during bath.
We use it daily for our 9-month-old; bath time is calmer with this mild wash.
Burt's Bees Baby Shampoo & Wash (350 ml) is good, but I wish it had more lather. We use it on a 5-month-old and it rinses off easily.
Easy to set up and reliable notifications. We have a 2-month-old and the device runs all night without issues.
Reliable and easy to clean. We've had it for 3 months and it has reduced our nighttime anxiety considerably.


