1.This apparatus is suitable for the small-size skin wound 2.According to different symptoms or different sensitivity on temperature of skin, the using time & times can be changed correspondingly. 3.Don’t use it on eyes . 4.Immediately change the battery if the LED indicator can’t be obviously seen or the temperature can’t be markedly felt. Advantages：Use Instruction: Clean and dry the wound, put the round window of the apparatus close to the wound without any movement, keep 10-20second per time. When the moderate warmth is felt,turn off the switch. Normally, this apparatus should be used 1~2 times per day, after 2-3days,the relevant pain will gradually vanish.