LEMFO K66 1.85 inch Bluetooth Call Smart Watch, Support Heart Rate Blood Oxygen 1. Function: Bluetooth callBluetooth music (super clear sound quality), weather display, heart rate detection, blood pressure detection, blood oxygen detection, time display, step counting, calories, distance, sleep monitoring, power onoff display, stopwatch, multi-sports mode, call notification, message reminder, multi-language push, alarm reminder, remote photo taking, sedentary reminder 2. The bracelet supports multiple languages: English, Chinese, Japanese, German, French, Spanish, Arabic, Russian, Ukrainian, Russian, Portuguese 3. Bluetooth version: 5.0 4. Main control chip: Realtek 8773EWE-VP 5. Memory: Flash 128MB 6. Screen resolution: 360x360 7. Heart rate: 3918 8. Speaker: 1306 9. Battery capacity: 730 mAh 10. Standby time: about 40 days 11. Working time: about 7-10 days 12 Motor: built-in, vibration reminder 13. Screen size: 1.85-inch AMOLED low-power full-circle screen