The Brand New My Zone MZ-1 Heart Rate Monitor is a high-tech fitness device that provides accurate heart rate monitoring along with other useful features such as speed tracking, time management, resistance level monitoring, and calorie counting. The heart rate target zone feature, Bluetooth connectivity, and smartphone compatibility enhance its functionality. This electric cordless device is suitable for various operating systems such as Windows, iOS, and Android, making it a versatile and reliable tool for fitness enthusiasts. I have 38 brand new monitors available. Retails for $90 through MyZone website.