Multi-Function Smart Ring Health Tracker with Sleep Heart Rate, Blood Oxygen Monitoring - Black / 18#
The smart ring offers a host of health and fitness monitoring features, making it an ideal companion for those who want to keep track of their well-being. 
Its long battery life ensures continuous tracking, and its accuracy in measurements provides valuable health insights.

Advanced health monitoring: The smart ring is equipped with comprehensive health monitoring functions, including calorie tracking, step counting, distance measurement and sleep monitoring from 8:00 PM to 8:00 AM (automatically extended to 12:00 AM)
Multi-sport modes: Enjoy a range of training activities with dedicated modes for running, cycling, jumping, fitness training, hiking, yoga, golf and dancing, allowing you to accurately track your performance
Heart rate and blood pressure monitoring: Stay informed about your heart health with real-time heart rate monitoring and accurate optical blood pressure measurement
Blood oxygen measurement: The smart ring supports accurate blood oxygen measurement, ensuring you have access to important health data
Long battery life: With up to 7 days of working time, 60 days of standby time and 180 days of shutdown time, the ring offers extended battery performance for uninterrupted health monitoring

Specifications:
Main controller: NORDIC NRF52832-CIAA
Charging chip: SY8602
Accelerometer: QMA6100P
Battery: Charging case 400mAh, Ring 23mAh
Photoelectric PPG Analog Front End (PPG AFE): HX3605
Movement measurement: Calories, Steps, Distance
Sleep monitoring: 20:00 ~ 8:00 (automatically extended to 12:00)
Multiple sports modes: running, cycling, skipping rope, fitness, rock climbing, yoga, golf, dancing
Heart rate measurement: Supported
Blood pressure measurement: Supported via photoplethysmography (PPG)
Heart rate alert: Not supported
Blood oxygen measurement: Accurately supported
Blood glucose measurement: Not supported (electrochemical measurement)
Temperature warning: Not supported
Automatic health monitoring: Supported
Activity information Data storage: Supported
Historical data storage time: rolling 7 days
Low battery shutdown: Supported
OTA upgrade: Supported
Automatic reset function: Supported
Self-check function: Supported
Fast/slow transmission switching function: Supported
Zero wipe of relevant data at midnight: Supported
Step accuracy: ≥95%
Sleep detection error: ≤1 hour
Resting heart rate accuracy: ±5bpm
Dynamic heart rate accuracy: ±20 bpm
Blood pressure accuracy: ±10 mmHg (average difference)
Blood Oxygen Accuracy: ±3%ECG signal: Suitable for dry skin, no significant noise in waveform quality
Battery life: 7 days
Standby battery life: 60 days
Shutdown Battery life: 180 days
Shutdown Power Consumption: ≤10uA
Standby power consumption: ≤50uA
Battery level display error: ≤3%
Charging time (hours): 1± 0.5h
Bluetooth transmission strength: 0dB
Bluetooth Central Frequency Offset: ±24KHz
Signal strength for Bluetooth receiver: ≥-50dB
Bluetooth wireless sensitivity: ≥-90dB
Button life: ≥100,000 times
Average no recovery time: ≥200 hours
Mean time between failures (MTBF): ≥1 year
Speaker power: No noise, no distortion
Operating temperature: 0 ~ 45 ℃
Storage temperature: -10~55℃
Operating humidity: 5% ~ 95% (non-condensing)
APP System Requirements: Android: 6.0 and above; iOS: 11.0 and later
Bluetooth version: 5.2
Charging voltage: 4.6 ~ 5.2V
APP: Smart Health

The package includes:
1 x Smart Ring
1 x Charging case
1 x English user manual
1 x Lanyard
1 x Charging cable

Other items are not included

• Multifunction Smart Ring Health Tracker Sleep Heart Rate Blood Oxygen Monitoring 18#