Wellue CheckmeO2 Max Oximeter Ring w/ App, Vibration Alert, 72H Battery, Black

Wellue CheckmeO2 Max Oximeter Ring w/ App, Vibration Alert, 72H Battery, Black/Grey (AU533)Item has been used before - Will show signs of usage such as scuff marks, scratches, dirt, dust, etc. PLEASE VIEW ALL PICTURES. Item has been removed from original packaging and handled for inspection - Please anticipate signs of handling. Outer packaging will have cosmetic imperfections. Product may not ship in original packaging. Includes all item(s) seen in picture(s) ONLY. Tracks SpO2, heart rate & motion continuously with high accuracy Soft silicone ring sensor fits comfortably & stays in place Smart vibration & sound alert for low O2 levels (adjustable) Free Vihealth app & O2 Insight Pro PC software for data review Stores 4 sets of 10-hour data; syncs automatically via Bluetooth Rechargeable battery lasts up to 72 hours (no AAA batteries needed) Note: Not a medical device – for sports and aviation use only Letters and Numbers in ( ) is the items location and is for our reference ONLY.