Garmin HRM-PRO Plus

Physical Specifications
Unit dimensions (LxWxD): 23.5”-56.0” x 1.2” x 0.5” (60.0-142.0 x 3.0 x 1.2 cm)
Weight: 1.8 oz (52 g)
Module size: 29.6 x 53.7 x 8.6 mm
Size adjustment: Bi-fold
Sizing range: 23.5”-42.0” (60.0-106.0 cm); 23.5”-56.0” (60.0-142.0 cm) with optional strap extender
Battery: CR2032
Battery door: Tool-free
Battery life: 12 months (Tri training 1 hour per day)
Water rating: 5 ATM
Operating temperature: 32°F-104°F (0°C-40°C)
Radio frequency/protocol: 2.4 GHz ANT wireless communications protocol; BLUETOOTH® Wireless Technology 5.0
Number of concurrent BLE connections supported: 3
Number of concurrent ANT connections supported: No limit
Range: 3 m
System Compatibility: ANT+, BLUETOOTH
 
HRM Pro Plus Features
Through ANT+® technology and BLUETOOTH® Low Energy technology, this dual-transmission monitor transmits accurate real-time heart rate and performance data to Garmin smartwatches and cycling computers, compatible fitness equipment, the Tacx® Training app and other apps.
HRM-Pro Plus captures running dynamics — such as vertical oscillation, ground contact time, stride length, vertical ratio and more — to help improve your form and enable running power on your compatible Garmin watch.
For your indoor track or treadmill sessions, this heart rate monitor transmits pace and distance information to your compatible Garmin smartwatch and over BLUETOOTH Low Energy technology, so you can get the data you need no matter where you train.
Even when you’re out of range from your watch, HRM-Pro Plus stores data during swims and other activities then sends it to your compatible Garmin smartwatch when you’re done.
During training or games, the heart rate monitor stores calories burned, intensity minutes and all-day heart rate. It even updates all Garmin devices via the Garmin Connect™ app and the TrueUp™ feature.