PG333 1.91 inch Waterproof Smart Sports Watch Support Heart Rate Monitoring Blood Pressure Monitoring 1. Functions: 6 sets of themes, custom dial, step counting, brightness adjustment, multi-sport mode, sleep detection, heart rate, blood pressure, blood oxygen, breathing training, information push, remote music, remote photo, real-time weather, search Mobile phone (connected to the mobile phone), alarm clock, stopwatch, do not disturb mode, female menstrual cycle, timer, game 2. Compatible system: Android 5.0 and above iOS 10.0 and above 3. Language: APP: Simplified, English, Traditional, Greek, French, German, Italian, Spanish, Dutch, Portuguese, Russian, Turkish, Japanese, Polish, Romanian, Thai, Vietnamese, Indonesian, Korean, Arabic Device side: English, Greek, French, German, Italian, Spanish, Dutch, Portuguese, Russian, Turkish, Japanese, Polish, Romanian, Thai, Vietnamese, Indonesian, Hebrew, Malay Instructions: English, French, Spanish, Portuguese 4. APP: PGfit 5. Chip: Realtek: 8762CK 6. Button type: 2 physical buttons 7. Bluetooth: BT5.1 8. Heart rate: LC11S 9. Material: zinc alloy + ABS 10. Screen size: 1.91-inch TFT high-definition square screen, screen resolution: 320x386 11. Screen type: IPS full viewing angle color screen 12. Screen material: glass 13. Battery type: lithium battery 14. Wristband Material: Silicone 15. Battery capacity: 340mAh 16. Battery life: 5-7 days for normal connection and 20-30 days for standby. (Connection usage depends on personal usage) 17. Charging method: Magnetic charging 18. Charging time: about 3 hours 19. Body net weight: 45 grams 20. Machine head size: 54.4x44.3x13.3mm 21. Overall length of wrist strap: 270mm