General

• Module dimensions: (LxWxD)2.1" W x 1.2" H x 0.3" D (53.7 mm x 29.6 mm x 8.6 mm)
• Size range:

Strap Length: 25"–36.5" (63.5–93 cm)

Fits chest size: 26.5"–42" (67.5–106 cm)

With optional strap extender: 23.5" - 56" (67.5 - 142cm)

• Weight: 1.9 oz (54.4 g)
• Water rating: 1 ATM
• Battery type: CR2032
• Battery life: Up to 12 months (using 1 hour per day)
• Battery door type: Tool free

HRM Connectivity

• Paris with Garmin Connect App Yes
• Transmits data over ANT Yes
• Transmits data over BLE Yes
• Number of concurrent connections supported: ANT: No limit; BLUETOOTH Low Energy: 3

Fitness Features

• Heart rate and HRV (Heart Rate Variability): Yes
• HRM Running Dynamics (with compatible smartwatch): Yes
• Stores and forwards heart rate data (with compatible smartwatch): Yes (swimming or stand-alone use cases)
• Swim interval heart rate stats (with compatible smartwatch): Yes
• XC Ski Power (with compatible smartwatch): Yes
• Activity tracking (steps, all-day heart rate, calories and intensity minutes) using Physio TrueUp: Yes (Garmin smartwatch required. SeeProDetails;FitDetails)

Check official page for compatibility with other systems and products.