Heart Rate — the Easy, Accurate Way This premium heart rate strap transmits real-time heart rate data over ANT+ connectivity and BLUETOOTH Low Energy technology, giving you more options to train indoors, outdoors or even online. With it, you’ll be able to consistently receive accurate heart rate on your Garmin device, in online training apps such as Zwift or even the compatible fitness equipment in your favorite class at the gym. Comfort and Convenience HRM-Dual features a soft strap that is comfortable and adjustable. Simply remove the heart rate module, and it’s washable, too. And don’t worry about running out of juice. The battery lasts for up to 3.5 years. Module: 2.4" W x 1.3" H x 0.4" D (62 mm x 34 mm x 11 mm) Strap Length: Adjustable from 25" to 52" (63.5 cm to 132 cm) Weight: 1.9 oz (54.4 g) Water Resistance: 1 ATM Battery: User-replaceable size CR2032 (3 volts) Battery Life: Up to 3.5 years (based on average use of 1 hour per day) Operating Temperature: 23°F–122°F (-5°C–50°C) Radio Frequency/Protocol: 2.4 GHz ANT wireless communications protocol; BLUETOOTH Wireless Technology 5.0 Range: 3 m System Compatibility: ANT+, BLUETOOTH Gently used condition. Please review photos carefully and ask any questions. Smoke-free home. Bundle & save!