The finger oximeter integrates the light sensing technology into the chip, without collecting human blood samples, and monitors the current oxygen content in the blood through light sensing penetration. At the same time, the human pulse rate is detected. Through the pen Segment LCD display, users ca......

In recent years, LED lamps have been greatly favored by the automotive industry. What are the advantages of LED lamps compared with xenon lamps and halogen lamps? Let's make it up to popularize this knowledge.

People who often touch the LED light belt will find such a phenomenon. The LED light belt just bought is always particularly bright, but after using it for a period of time, the light belt will become darker and darker. What is the reason?