Grove - Ear-clip Heart Rate Sensor<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Low power consumption</li><li>Wide power supply range: DC 3~5V</li><li>Convenient to use</li><li>High sensitivity</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41g9mvj2-bL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/317ZkJQ6mtL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41JpGgGPRQL.jpg" noproxy>