Pulse Sensor is a well-designed plug-and-play heart-rate sensor compatible with Arduino. It can be used by students, artists, athletes, makers, and developers who want to easily incorporate live heart rate data into their projects. The sensor clips onto a fingertip or earlobe and connects directly to Arduino using jumper cables. It includes an open-source monitoring application that displays real-time pulse readings. Color: Black Material: ABS plastic Power supply: 3-5V Compatible with: Arduino, Raspberry Pi Diameter: 16mm Magnification: 330 LED Wavelength: 609nm Dimensions: 220mm x 16mm Package Includes: 1 x Pulse Heart Rate Sensor Module Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3cm.