R12M SIZE 18 Smart Ring, Support Health Monitoring Multiple Exercise Modes About Product 1. Main Chip: DA14535 2. Bluetooth: 5.3 3. Sensor chip: Miramems da267 4. Battery Capacity: 15mAh 5. Battery life: 5-7 days of use and 15-20 days of standby 6. Charging time: About 1-2 hours 7. Waterproof: IP68 waterproof 8. Size 18: Dia=17.8mm; Circumference=55.8mm 9. Charging method: Magnetic charging 10. Compatible system: Android5.1 or above, iOS8.0 or above 11. APP: LuckRing 12. APP support language:Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Turkish, Hebrew, Greek, German, Italian, Latvian, Czech, Slovak, Slovenian, Japanese, French, Polish, Thai, Estonian, Swedish, Lithuanian, Simplified Chinese, Traditional Chinese, Romanian, English, Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean, Malay Packing list: Smart ring x 1 Charging cable x 1 User manual x 1 COMPATIBLE retail box x 1