Feature(may vary by option.)

●Optical Heart Rate Armband and ±1BPM Calorie Tracker: COOSPO HW9 heart rate armband uses optical heart rate technology to provide accurate heart rate and calories burned, with ±1BPM monitoring error.
●Heart Rate Zone Tracking & HRV Function: HW9 has a 5-color LED indicator light for heart rate zone training, which shows your heart rate zone at a glance, so you can optimize your intensity levels at the right time. Also supports heart rate variability (VFC).
●COMFORTABLE TO WEAR: The Armband Heart Rate Monitor is a great alternative to chest straps and wrist devices. The HRM Armband sensor allows maximum freedom of movement and works in countless different sports. HW9 with soft, breathable and adjustable band for all workouts and exercises.
●【Connectivity】Bluetooth 5.0 and ANT+ ensure that you can connect COOSPO HW9 armband heart rate sensor with GPS/APP bike computers/fitness devices/running watches. You can have two simultaneous Bluetooth connections with the latest technology.
●MAXIMUM HEART RATE CUSTOMIZATION: Heartool/Coosporide App allows you to customize your actual maximum heart rate with HW9, to reach your true heart rate zone and optimize your intensity levels at the right time. (The default MAX heart rate is 200bpm)
●MAXIMUM HEART RATE VIBRATION - When your heart rate is higher than the maximum heart rate value or your personalized value, HW9 armband emits a warning vibration, ensuring your workout is safe.
●Rechargeable battery: To extend the battery life, please use a DC 5V power adapter or computer USB port for charging.

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