Digital blood oxygen saturation detection module:  The blood oxygen module is a multi-parameter output module developed based on the traditional photoelectric transmission measurement principle, which can output parameters such as blood oxygen saturation, pulse rate, blood perfusion index, and digital value of photoelectric volume waveform. It is small in size and has a semi-hole design, which can be posted on the PCB. Users only need to communicate through the serial port to complete the data transmission and reception, and the operation is convenient.  The module evaluation kit consists of two parts: a blood oxygen probe and a digital blood oxygen detection module.  This module is only part of the pulse oximeter, so it cannot be used as a finished product alone, but it is a good choice for research and development.     Specification:  Pulse SpO2:  Measuring range: 35-100% (resolution 1%).  Measurement accuracy: 70-100% (error 2%).  Pulse rate PR:  Measuring range: 35-250bpm (resolution 1bpm).  Measurement accuracy: 2bpm or 2%, whichever is greater.  Blood perfusion index PI: Measuring range: 2-200%.  Digital value of photoelectric volume wave pattern: Measuring range: 0-2000.     Package includes:  Type 1: 1 x Blood oxygen module.  Type 2: 1 x 1 meter finger sleeve probe.  Type 3: 1 x 1 meter finger clip probe.  Type 4: 1 x 2 meter finger sleeve probe.    Type 5: 1 x 2 meter finger clip probe