Detailed Instructions: 1. Take out one piece of non-woven tape, put the temperature patch through the hole. Rip off the release paper, then paste it to the back side of the temperature patch. 2. Rip off the release paper , then fix the temperature sensor on the back side of the non-woven tape. 3. Paste the fixed temperature sensor to the armpit, and lightly press to make sure it is successfully attached to the skin. Note: 1. Its recommended to replace at least every 24 hours. 2. Keep dry and out of direct sunlight.