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This is a study exploring the use of digital health devices and sensors in healthy children. The purpose of this study is to learn more about health sensors (such as wearables devices) to measure physical function and gait. For this reason, Pfizer is conducting a study on health sensors to collect information to better understand their use in clinical research, including looking at data and assessing the comfort and wearability of these devices. 

The children will be asked to participate in the study for approximately two weeks. The study will involve coming one time to the study site, the Pfizer Innovation Research Laboratory at 610 Main Street, in Cambridge, Massachusetts. The study visit will last about two hours. 

During the visit to the study site, children will be asked to wear sensor devices while performing everyday tasks such as walking, sitting, standing, walking, and turning. After the study visits, participating children will continue in the study with a two weeks at-home period.  During the at-home portion the children wear two devices. One device will be worn on the wrist for the entire time child is at home. The other device will be worn on their lower back from when they get up in the morning until they go to sleep at night. The study team will give instructions on how to wear the devices in the lab and during the at-home monitoring period.  

If eligible there will be compensation for taking part in the study. Please see below the eligibility criteria. 
•    Being between 3 and 17 years old inclusive,
•    Be generally healthy and ambulatory,
•    Not have any electronic implanted medical device (such as a pacemaker, an insulin pump, etc.),
•    Not recently have been part of any other studies involving digital devices and/or investigational drugs,
•    Not have a parent or a family member as an employee of the study team.
•    Not be pregnant.
•    Not be allergic to components such as plastic, silicone, or stainless steel. (Allergy is usually documented by a reaction you have had to exposure to these substances in the past. If you are unsure whether you are allergic to them you will be counseled on the risk for an allergic reaction such as pain, itching, or skin redness.)