Purchase Qty. Reference FOB Price
10-100 Pieces US$0.25
101-500 Pieces US$0.24
501-1,000 Pieces US$0.23
1,001+ Pieces US$0.22
Product Description
Welcome to our shop Our store has more types of products. If you have any question please contact us we will do our best to make you enjoy a Happy Shopping This project uses bright infrared (IR) LED and a phototransistor to detect the pulse of the finger, a red LED flashes with each ...