SPECIFICATIONS

Activity Tracked: Activity Tracker,Steps Tracker,Distance Tracker,Calorie Tracker

Battery Capacity(mAh): 16mAh (13mAh for sizes 6 and 7)

Brand Name: MISIRUN

Case Material: STEEL

Certification: ce,FCC

Choice: yes

Function: Health Monitoring

High-concerned chemical: none

Memory storage capacity: RAM256KB NVM1.5MB

Metrics measured: Heart Rate Monitor,Sleep Monitor,Blood Oxygen Monitor,Body Temperature Monitor,Stress Monitor

Model Number: R21

Origin: Mainland China

Waterproof Grade: 5ATM

Basic Parameter

Chipset Supplier: Nordic
Chipset: nRF 54L15
APP: QRing
Compatible System: for Android 5.1 and above, IOS 9.0 and above
Memory: RAM256KB NVM1.5MB
BT: 5.4
Sensor: ST LIS2DOC
Heart Rate: Tianyi Hexin 3697, Dual PD
Battery: 16mAh (13mAh for sizes 6 and 7)
Charging Method: Magnetic charging
Waterproof: 5ATM
Ring charging time: about 1.5h
Appearance material: Stainless steel

Major Function

--Daily activities: step count, distance, calorie calculation
--Health Management: Heart rate monitoring, blood oxygen saturation, HRV (Heart Rate Variability), stress tracking, sleep tracking, multiple exercise modes, body temperature measurement, body battery level, breathing exercises
--Other Features: Health Monitoring, Gesture Control, Ring Games, Remote Photography, Ring Finder, Women's Menstrual Reminder, Friends & Family Leader board, AI Analysis

Software Feature

--Activity, sleep, heart rate, exercise recording, heart rate variability, blood oxygen, stress
--Gesture control, health monitoring, device search, remote photography, ring game, themed skins
--Unit format, 24-hour switching, low battery prompt
--Supported languages: Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Türkiye, 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