Ozlo Sleepbuds 2: Sleep Tracking Falls Short

Ozlo's second-generation sleep earbuds, the Sleepbuds 2, have been released with enhanced features, including environmental sensing and sleep tracking. Priced at $279, these premium earbuds compete with other high-end audio devices but focus on aiding sleep rather than high-fidelity audio playback. They utilize soundscapes and noise-masking technology to help users fall asleep.

While the Sleepbuds 2 are praised for their comfortable design, allowing for side sleeping, and their ability to stay securely in place throughout the night, their sleep-tracking accuracy is questionable. Compared to a trusted device like the Oura Ring 5, the Sleepbuds 2 accurately measure total sleep duration and wake times but exhibit significant discrepancies in sleep stage detection. For instance, REM sleep can be vastly underestimated, and light and deep sleep stages are frequently miscalculated.

Additionally, the environmental tracking feature, which monitors sound, brightness, and temperature via the case, is present but its immediate utility is uncertain. The battery life has been extended to approximately two nights per charge, an improvement over the previous generation. Ultimately, the Ozlo Sleepbuds 2 are best suited for individuals seeking noise cancellation and comfort to achieve sleep, with the sleep tracking serving as a secondary, less reliable feature.