Garmin HRM Dual Heart Rate Monitor Train indoors, outdoors or even online with the HRM-Dual monitor. In addition to ANT+ connectivity, this comfortable, soft strap heart rate monitor transmits real-time heart rate data over BLUETOOTH Low Energy technology. That lets you connect with third-party training apps such as Zwift, GPS watches, bike computers and even the compatible fitness equipment in your favorite class at the gym plus your Garmin GPS watch or bike computer. Train year-round, and get the accurate, real-time heart rate data you need to take your performance to the next level. You won’t even need to think about replacing the battery for up to 3.5 years. Depth: 12 MM Premium heart rate strap transmits real-time data over ANT+ connectivity & BLUETOOTH to communicate with Garmin GPS watches, bike computers & more Battery life: up to 3.5 years Soft strap is comfortable, adjustable & washable — simply remove the heart rate module Provides reliable, real-time heart rate data for maintaining or improving fitness when training indoors, outdoors or even online Height: 1006 MM Width: 30 MM