The AliveCor KardiaMobile Single-Lead Mobile ECG Event Recorder is a handheld device designed for cardiology applications. It features a single lead, one channel, and is operated digitally through a mobile app. This ECG event recorder is intended for resting use, making it ideal for capturing and monitoring heart activity on the go. With its compact and portable design, the KardiaMobile unit offers convenience and accuracy for healthcare professionals and individuals looking to track their heart's rhythm remotely. Note that the phone clip is missing.