Description:  HEART RATE HAT is a blood oxygen heart rate sensor. Integrate MAX30102 to provide a complete pulse oximeter and heart rate sensor system solution. This is a non-pluggable blood oxygen heart rate sensor. The sensor uses I2C communication interface, internally integrates infrared light-emitting diodes,  optical components and low-noise electronic equipment. A certain amount of ambient light suppression function can make the measurement results more accurate.  Instructions: After the program is running, place your finger on the test area with a stable and fixed pressure.     Product Features:  Heart rate monitor and pulse oximeter sensor.  LED reflective solution.  Integrated protective glass, sturdy and durable performance.  Programmable sampling rate and LED current.  Fast data output capability.  High sampling rate.  Strong elasticity of motion artifacts.  High signal-to-noise ratio.     Specification:  Communication protocol: I2C, 0 x 57.  Operating Voltage: 3.3V.  Net weight: 5.1g.  Gross weight: 12.7g.  Product Size: 25*24*14mm.  Package Size: 40*40*30mm.  Case Material:  Plastic ( PC ).     Package included:  1 x HEART RATE HAT.  1 x Double-sided tape.     Applications:  Wearable device Heart rate blood oxygen collector Smart Medical