Garmin 010-12883-00 HRM-Dual Heart Rate Monitor

Garmin premium heart rate chest strap transmits heart rate data in real time via Bluetooth Low Energy and ANT+
Battery life of approx. 3.5 years (with average use of 1 hour per day)
More training options to receive consistently accurate heart rate data on a Garmin device, online training apps or compatible fitness equipment during gym workouts
Adjustable and comfortable premium heart rate chest strap made of soft material with removable heart rate module
Color: Black
Package Dimensions: 6.197 L x 17.297 H x 7.010 W (centimeters)
HRM Dual heart rate transmitter. Note: Product is compatible with all Garmin devices
The strap length is adjustable from 25″ to 52″ (63.5 cm to 132 cm).