All Things Ancient Greece: An Encyclopedia of the Greek World [2 volumes]

The Thinnest Air

Heartix HRM Heart Rate Monitor for Streaming and Gaming

COOSPO HW9 Heart Rate Monitor Bluetooth ANT+ Armband with Accurate HR Zones/Calories Burned Data, HRM Optical Sensor for Fitness Training/Cycling/Running,Compatible with Peloton,DDP Yoga,Wahoo APP

EKG Monitor Device, Personal Heart Rate Monitor with LCD Screen and Storage, Portable ECG Monitor Compatible with PC and Smartphone, Instant Results in 30 Seconds

EMAY 6L Portable ECG Monitor | Record ECG and Heart Rate in 6 Channels | Compatible with Smartphone and PC | No Subscription Required

COROS Heart Rate Monitor, Auto-wear Detection - Grey, Standard

KardiaMobile Card Credit-Card Sized EKG, Medical-Grade & FDA-Cleared Personal Heart Monitor, Bluetooth Enabled, On-The-Go Check-Up Anywhere, Compatible with Most Smartphones, No Subscription Required

KardiaMobile 6L Max 6-Lead EKG + One-Year Membership, Unlimited Recordings