A collection of non-sterile, noninvasive devices intended to be used in conjunction with an electrocardiographic (ECG) long-term ambulatory recorder (holter monitor) to facilitate recording. It includes an ECG electrode(s), batteries (to power the recorder), devices intended to assist electrode application (e.g., razor, electrode placement guide, conductive gel, skin cleaning wipe, tape), and may include other patient-supportive devices (e.g., diary/notebook); the recorder is not included. This is a single-use device.