Wow! It worked on my tattoo. First, put numb cream, let cream sit on the tattoo for 2 hours, wrap the numb cream in plastic on the tattoo, wear safety laser red color goggles laser pen setting is from 1-9 put setting on 5. You can adjust it to 4 if it stings. Put pen speed at 3. Only stay 15 seconds on the area count 1-15 and move the pen around on the tattoo area to target it. To Make sure pen is working when pen makes a very loud beeping sound it means its on. I'm shocked this laser pen works! But please operate with the safety goggles