Recommended Device - Vivosmart 4

• Highlights: Low profile, modest price, long battery life, maximum data points
• Includes advanced sleep monitoring with REM sleep and can gauge blood oxygen saturation levels during the night with the wrist-based Pulse Ox² sensor
• Includes continuous wrist-based heart rate, all-day stress tracking, relaxation breathing timer, VO2 max, Body Battery™ energy monitor and more
• Battery life lasts 5-7 days (less when PulseOx is activated) and is safe for swimming and showering, too.