COROS HRM-GRY Optical Arm Heart Rate Monitor with Bluetooth 5.0 & ANT+

Track every heartbeat with clinical precision – the COROS HRM-GRY optical armband delivers up to 38 hours of continuous heart rate monitoring on a single charge, making it an indispensable companion for endurance athletes and data-driven trainers.

Overview

The COROS HRM-GRY uses advanced optical sensor technology to capture accurate heart rate data from your bicep or forearm. Its soft, adjustable nylon band ensures a secure and comfortable fit even during intense workouts. Thanks to dual wireless connectivity via Bluetooth 5.0 and ANT+, this armband pairs effortlessly with COROS watches, third-party fitness devices, and popular training apps.

What stands out

• Dual connectivity: Bluetooth 5.0 (up to 3 simultaneous connections) and ANT+ (unlimited connections) transmit real-time heart rate data to multiple devices.
• Exceptional battery life: up to 38 hours of active use and 80 days of standby time, with a quick magnetic USB-C charging system that fully recharges in under 2 hours.
• Built for all conditions: 3 ATM water resistance (30 meters) and an operating temperature range from -20°C to 60°C ensure reliability in rain, sweat, and cold weather.
• Lightweight and comfortable: sensor weighs just 19g, armband adds only 12g; the elastic nylon material is soft against the skin and stays put through any movement.

Technical details

• Sensor technology: Optical heart rate sensor
• Wearing position: Armband (bicep/forearm)
• Connectivity: Bluetooth 5.0, ANT+
• Battery life: Up to 38 hours active, up to 80 days standby
• Charging interface: Magnetic USB-C
• Charging time: < 2 hours
• Water resistance: 3 ATM (30 meters)
• Operating temperature: -20°C to 60°C
• Band material: Soft nylon fiber
• LED indicator: Yes (connection and battery status)
• Firmware updates: Supported via COROS app
• Compatibility: COROS watches, third-party Bluetooth/ANT+ devices

Our verdict

The COROS HRM-GRY is a top-tier optical armband that combines rock-solid connectivity, remarkable battery endurance, and all-weather durability in one sleek, lightweight package. Whether you're training for a marathon or fine-tuning your interval paces, this sensor delivers the consistent, precise heart rate data you need to perform at your best.