Wellue™ Wearable Wellness Ring & Oxygen Monitor-Sleep with Peace of MindFeatures and further details: Wellue Adults O2 Ring Wearable Sleep Monitor Oxygen level Monitor Heart Rate Monitor Bluetooth Health Tracker With Free APP & PC Reports COMFORTABLE SOFT RING SENSOR: Designed with the softest and lightest materials for absolute comfort during overnight use adapting to personal finger size. Never slips from your finger, completely frees your finger, it is like wearing nothing. PROFESSIONAL SOFTWARE: 100% Free APP & PC

The built-in memory can store 4 groups of 10 hours of data on device

has simple and modern face design

strong surface

and it does not shake while you write

as well as those who have or may have sleep apnea and other sleep

This is much cheaper than buying all writing or drawing tools separately

Innovative design gives the capability for hand

0 compatibility allows DuoEK to work with most iOS & Android smartphones & tablets

Sleep Apnea Assistant: Our sleep tracker watch

Accurate Tracking: Designed to continuously track blood oxygen

Never slips from your finger

just by wearing the O2Ring on your finger