Amazon has Activity Tracker Watch Heart Fitness Rate Monitor on sale for $19.71 w/promotion code 9P89QBEP
Specs:
- Charging method: USB charging (Built-in USB plug, no charging cable needed)
- Charging time: 1-2 hours Weight: 0.83oz (23.5g)
- Screen type: 0.96inch OLED Touch Color Screen
- Band Material:TPU
- Dimension: suits for wrist size: 5.4 inch – 7.6 inch
- Battery Capacity: 90mAh Lithium Polymer Battery
- Working time: 5-10 days
- Water-Resistance level: IP67 waterproof