The Sportline Solo 915 SP4964BK is part of the Heart-rate monitor
test program at Consumer Reports. In our lab tests, Heart-rate monitor
models like the Solo 915 SP4964BK 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.