The Sensr 4.0 heart rate armband uses optical heart rate technology provided by Valencell, which offers accurate heart rate and steps utilizing a built-in accelerometer. This is the most comfortable and lightweight armband heart rate monitor on the market and is equipped with Bluetooth and ANT+ technology. Comfortably worn on the bicep, forearm or leg (if you choose to use the accelerometer to count cadence), the Sensr 4.0 heart rate monitor comes with two adjustable bands (small and large) and is water resistant. It has an easy magnet charging dock and the rechargeable battery gives you a full 20 hours of power and 8 hours of memory. The Sensr 4.0 seamlessly pairs with the Heart Tech Plus group app and HOME app along with smartphones, fitness apps, and most GPS bike computers and watches. The Sensr 4.0 offers 3 zone lights and works as followed:

Sensr 4.0 will blink blue: The user’s heart rate is 119 BPM or lower

Sensr 4.0 will blink green: The user’s heart rate is 120 BPM-179 BPM

Sensr 4.0 will blink red: The user’s heart rate is 180 BPM or higher

Features: Heart Rate, Steps and Cadence

Transmission: ANT+ and BLE

Memory: 8 hours

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