has the WearO2 Wearable Pulse Oximeter for $71.40. Shipping is free.
Use code SDWEARO2
- Wearable oxygen monitor with the medically accurate sensor, to measure & record SpO2 & PR.
- Easy-to-wear ring designed for comfortable daily use.
- Smart vibration to warn low blood oxygen levels.
- Real-time blood oxygen levels & heart rate data, long-term data & detailed reports showed on free mobile app.
- Bluetooth connection.
- OLED display to show clear results.