The HSL-101 has a radio frequency sensor that sends out waves over a roughly 5-foot range. It stands by the bedside and starts scanning once you press the "good night" button.
The device detects body movements such as tossing and turning, as well as breathing. Blankets won't affect the sensor.
The HSL-101, which hits the Japanese market in May, analyses the data and gives you the total time you're awake and asleep with corresponding smiley faces (or sad faces) in the results display. … Read more