Table 1.
Summary of wearable devices to monitor sleep stages
| Type | Product | Signals |
|---|---|---|
| Headband | Dreem Headband | EEG (O1, O2, Fpz, F1, F8), Acc., PPG, SpO2 |
| Sleep Shepherd | EEG | |
| Muse Series | EEG, Acc., PPG, SpO2 | |
| In-ear | Nightbuds | EEG, Acc. |
| Watch | Halo Band | PPG, Acc. |
| Fibit Series | ||
| Apple Watch Series | ||
| Galaxy Watch Series | ||
| Biostrap | ||
| Actiwatch Series | Acc., Light Illuminance | |
| Whoop 4.0 | Skin Temp., Acc., PPG, SpO2 | |
| Ring | Oura | PPG, Acc., Skin Temp. |
| Sleepon | PPG, SpO2 | |
| Etc. | WatchPAT 300 | PAT, PPG, SpO2, Acc., Body Position, Sound (snoring), Resp. (chest movement) |
EEG electroencephalogram, Acc. Accelerometry signals, PPG photoplethysmogram, Skin Temp. Skin temperature, PAT peripheral arterial tone, Resp. Respiration