Various embodiments are related to wearable device and obtain the object that the signal from object is used to monitor pulse relevant information. To makes the relevant information of pulse using this equipment monitor, it provides unobtrusive, repeatable, it is easy to use, simple measurement, the device includes ontology, PPG induction of signal units, for obtaining the first PPG signals from the first body position object and imaging unit, for obtaining sequence image from the second main body, the main body and the first body position, the sequence of described image are the objects for being configured to the second physical feeling of the 2nd PPG signals of export. The PPG sensings unit and the camera unit are mounted on or in device noumenon and are configured as obtaining the first PPG signals and image sequence simultaneously.
