Peloton Heart Rate Monitor - Pod/Arm band (Size Large) INTERACTIVE HEART RATE TRACKING – Easy-to-read rainbow LED lights that show your heart rate zone at a glance STRIVE SCORE – Measure how much time you spend in each heart rate zone to track how hard you’re working during every workout on the Peloton App, Bike, Tread, or Guide. RECHARGEABLE BATTERY – Provides up to 10 hours of battery SIZING – Measure the circumference of your forearm 3 to 4 fingers below your elbow crease. Large armband: For forearm circumferences 10.5 to 13.5 inches Pls note: REMOVED from original packaging but never used or worn