ITEM NAME:Heart Rate Pulse Sensor Pulsesensor Detector Module w/ Ear Clip for Description: Pulse Sensor is a well-designed plug-and-play heart-rate sensor for . It can be used by students, artists, athletes, makers, and game & mobile developers who want to easily incorporate live heart-rate data into their projects. The sensor clips onto a fingertip or earlobe and plugs right into with some jumper cables. It also includes an open-source monitoring app that graphs your pulse in real time. Voltage: 3V / 5V Specification: Input Voltage (Vin): 3V - 5V (5V recommended) Operating current: