Ozlo is an American company that makes wireless earbuds for overnight use. Sleepbuds stream audio at bedtime, then shift to noise masking to reduce disruption from surrounding sounds. They provide alarms and sleep information.

How it works
Soft ear tips create a passive seal, while tuned audio covers surrounding noise. Motion sensors help estimate when the user falls asleep to change audio automatically. A microphone measures sound intensity without recording, and light and temperature sensors add context. The charging case connects the earbuds and app.

Key considerations
Noise masking reduces the impact of sound but does not remove it, and wearing earbuds overnight may be uncomfortable for some people. Fit affects comfort and masking. Sleep estimates are limited and can be wrong. Users must still hear important alarms when needed.