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Finger Heartbeat Detection Modules for Arduino - Black (2 PCS)
Quantity 1 DX.PCM.Model.AttributeModel.Unit Form Color Black Material PCB English Manual / Spec Yes Download Link http://pan.baidu.com/s/1gdITLYj Other Features + - 5V; s - Signal; - GND. Certification N/A Packing List 2 x Modules