Unverified50% confidenceFactExact time
Echo Time uses ultrasonic technology to detect the user's breathing patterns and small movements to determine the optimal wake-up moment.
1
Sources
50%
Confidence
Long-term
Relevance
10/28/2026
First Seen
Sources
Amazon's $200 Smart Alarm Clock Echo Time: Is It Worth Buying?
youtubeThe Verge10/28/2026
Related Entities
Related Claims
UnverifiedThe principle of ultrasonic sleep detection is to emit high-frequency sound waves (typically above 20kHz) and infer breathing rate and body movement amplitude by analyzing the frequency shift and arrival-time changes of the echoes.74% similarUnverifiedAccording to the original report, the Echo Time can "sense you sleeping".73% similarUnverifiedIf the Echo Time's sleep monitoring function is accurate and reliable, it could become a new option for bedside devices.71% similar
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