a reflective sensing module is disclosed which can be embedded in a wristband for sensing a health information of a person wearing it . the health information can be wireless transmitted directly or indirectly to the internet for a further process . the reflective sensing module comprises a top glass , a bottom circuitry configured on a bottom surface of the top glass , a light chip and a sensor chip are electrically coupled with the bottom circuitry of the top glass ; wherein the light chip emits light beams upwards passing through the top glass to an object ; the sensor chip detects reflective light beams downwards passing through the top glass for a further process .