COROS Heart Rate Monitor Band White

Purchased on Amazon in February 2025 and used for about 3 months, but I no longer use it, so I am listing it for sale.
Overall, I believe it is in beautiful condition.

The battery life is excellent from the start, to the point where I forget to charge it (imagine it lasting a month even with 1 hour of use per day), so I don't think there are any issues with degradation.

Please only purchase if you understand that this is a used item (used daily for about 3 months).

Includes the box and charging cable.

[Design Pursuing High Accuracy] The COROS optical heart rate sensor provides heart rate accuracy comparable to chest strap heart rate sensors. It breaks through the limitations of wrist-based measurements, offering approximately 38 hours of accurate data for all activities such as cycling, running, climbing, and high-intensity interval training.
[Why the Arm?] Wrist-based heart rate sensors are convenient, but accuracy remains a challenge for all brands and products. However, the upper arm has optimal blood flow, allowing for more reliable data when the heart rate sensor is worn on the arm.
[Lasting Comfort] Chest strap heart rate sensors offer high accuracy, but their comfort can be lacking. The COROS heart rate sensor uses soft fabric and a thin band that prevents snagging. This allows for a secure and comfortable fit on the arm. The adjustable buckle ensures a snug fit against the skin. It also features a Velcro closure for easy removal during washing.
[No Buttons, No Frustration] The COROS heart rate sensor is equipped with an automatic wearing detection function, allowing it to automatically turn on/off based on whether it is worn. It can be simultaneously connected to other sports watches or Bluetooth-compatible devices (such as indoor trainers, cycle computers, etc.). Please note: The heart rate sensor alone cannot connect to the COROS app for measurement. It must be used in conjunction with a watch.
[Excellent Band] High-accuracy measurement functions by securely fixing the optical heart rate sensor to the skin. The COROS band is designed to ensure the sensor adheres closely to the arm, preventing external light from entering.