Sportline S7 SB4221BL (Walmart)

The Sportline S7 SB4221BL (Walmart) is part of the Heart-rate monitors test program at Consumer Reports. In our lab tests, Heart-rate monitors models like the S7 SB4221BL (Walmart) are rated on multiple criteria, such as those listed below.

Accuracy: Accuracy was measured against a highly accurate electrocardiograph; the higher the accuracy score, the more often the monitor displayed the same heart rate as the reference did.

Ease of use and features: Ease of use includes features, clarity of instructions, and convenience as judged by panelists who used the devices.

Sport versatility: Sports versatility indicates whether a model is difficult or easy to use for all or most sports.