| Brand | HAYLOU |
| Model | Watch 4S |
| Device Type | Smartwatch |
| Release Date | 14 July 2025 |
| Status | Available |
| Operating System | Android |
| OS Version | v9.0 |
| Display Type | TFT |
| Screen Size | 1.43 inches |
| Resolution | 466x466 px |
| Weight | 62 grams |
| Colors | Black, Silver |
| Yes | |
| Text Message | Yes |
| Incoming Call | Yes |
| Alarm | Yes |
| Calendar Reminder | Yes |
| Timer | Yes |
| Weather | Yes |
| Battery type | Li-Ion (Lithium Ion) |
| Capacity | 300 mAh |
| Placement | Non-removable |
| Network | N/A |
| WLAN | No |
| Bluetooth | v5.3 |
| GPS | No |
| Loudspeaker | Yes |
| Made By | China |
| Features | Accelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2 |
