The primary objective of this study is to assess the concordance of specific ECG parameters obtained in the everbeat nine-lead ECG waveform with those obtained in the comparable leads from a standard 12-lead ECG recorder.

R Peak Amplitude intraclass correlation coefficient between test and reference devices in mm

Concordance in ST-segment deviation from the TP segment if present in mm

Identify the first six consecutive distinct readable PQRST complexes without artifacts that match between the strips for evaluation. Each reviewer will assign a pass/fail to the strips by visually assessing all 6 PQRST complexes. A "pass" is given when the morphology of the PQRST complexes appears to overlay to the unaided eye. A measurement of the R amplitude from the isoelectric baseline to the nearest millimeter for the first two QRS complexes in both the reference strip and everbeat strip. The reviewers will be blinded to the identity of the reference strip and everbeat strip.

To assess the ease of use of the everbeat ring in a random selection of users.