Are you a study participant?

If you are a Study Participant, contact your Administrator directly as information in the Support Center is intended for qualified researchers and healthcare professionals. Misapplying the information below may affect your data collection.

No light is turning on when I press the button

The battery is probably empty. Please connect the E4 to a powered USB port and allow it to charge for several minutes.

If you haven't found the answer to your question, click the button below and complete the typeform. We will receive all the information needed to assist you further.