Heart Rate Pulse Sensor Module ( Pack of 25)

Heart Rate Pulse Sensor Module
Pulse Sensor is a low-cost, very small-size plug-and-play heart rate sensor for Arduino and Arduino compatible boards. It can be used by students, artists, athletes, makers, and game & mobile developers who want to incorporate live heart-rate data into their projects easily. Pulse Sensor Amped adds amplification and noise cancellation circuitry to the hardware. It’s noticeably faster and easier to get reliable pulse readings. Pulse Sensor works with either a 3V or 5V Arduino. 
A Color-Coded Cable, with standard male header connectors. Plug it straight into an Arduino or a Breadboard. No soldering is required.
An Ear Clip perfectly sized to the sensor. It can be hot-glued or epoxied to the back of the sensor to get a reading from an ear lobe.
Parts to make a handy Velcro finger strap. This is another excellent way to get heart-rate data.
Heart Rate Pulse Sensor Module Video Tutorial:
Video Tutorial on Heart Rate Monitoring with Arduino
Pinouts:
Pinout of Heart Rate Pulse Sensor Module
Ao –  Analog value output connector
VDC – Connect to 3.3V-5V
GND – Connect to GND
Applications:
Sleep Tracking
Anxiety monitoring
Remote patient monitoring or alarm system
Health bands
Complex gaming consoles
Package Includes:
25 x Pulse Sensor Module
Specifications:
Power supply voltage
3.3V ~ 5V
PCB Diameter (mm)
15
Package Dimensions 
8 × 6 × 2 cm
Weight 
50 grams