Withings Sleep Analyzer Under-Mattress Sleep Tracker WSM02, Grey

The Withings Sleep Analyzer Under-Mattress Sleep Tracker WSM02 is a flat sensor mat designed for placement beneath a mattress to monitor sleep patterns without a wearable device. Its primary function is continuous tracking of sleep stages, heart rate, snoring, and breathing disturbances. A defining capability is the clinically validated sleep-apnoea detection, which identifies possible indicators of the condition for discussion with a healthcare professional. The system relies on automatic app-based monitoring to capture data unobtrusively overnight.

Constructed from a grey fabric textile, the mat operates on a USB-powered external supply and transfers data to the Withings Health Mate app. The device is firmware-upgradeable to maintain functionality over time. For broader tracking, it integrates with Apple Health, Google Health Connect, and Google Fit. Compatibility extends to mobile devices running iOS 18 or newer and Android 12 or newer. The sensor lacks a built-in display and is not waterproof, reflecting its stationary placement.

• Physical dimensions of 190 mm by 637 mm with a 5 mm thickness — fits flat beneath standard bedding without creating surface irregularities
• Total weight of 350 g — allows for straightforward one-time placement
• Bluetooth 4.0 connectivity — transmits recorded sleep metrics to a paired mobile device for review
• Sold as a single unit per pack — provides one sensor for individual use
• Lightweight and reusable design — intended for continuous, long-term nightly operation