- Creative Strap Design
- Blood Oxygen Testing
- Heart Rate Monitoring
- 12 Workout Modes
| Model | Haylou RS4 |
| Color | black |
| Bluetooth Version | BT v5.1 |
| Compatible System | Android system 6.0 version or above; iOS system 11.0 version or above |
| Operating Mode | Full Touch |
| APP Name | Haylou Fun |
| Waterproof | ATM 5 |
| Personalized Dial | Multi-Dials |
| Sensor | Low-power dynamic optical heart rate sensor, acceleration sensor, Sony GPS |
| Sport Modes | Jogging, Fast walking, Biking, Climbing, Spinning, Yoga, Indoor running, Integrated training, Gymnastics, Basketball, Football, Rowing, Open water swimming, Swimming pool. |
| Screen | Size: 1.78 inch Type: AMOLED Resolution: 368*448 |
| Material | Band Material: Silicone Watch Case Material: aluminum alloy |
| Battery | Battery Capacity: 230mAh Standby Time: about 30 days Using time: About 5-7 days Charging Time: About 1-2 hours Charging Method: Magnetic |
| Size | Size: about 45.2*37.2*11.1 Strap Size: 20mm Weight: 48.6g |
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