Advantages of Cool-Spot Sense: 1, Stanch and Relieve Pain. Simple operation. 2, Easy for colouring. No pain and swelling. 3, Restore the original color of pigment. 4, Obvious effects of detumescence and anti-inflammation. 5, Legal for beauty studios. 6, Cost-effective for One-time purchase. 7, Risk-free for anesthetic allergies. 8, Multi-functional use, such as facial skin-care. 9, Long-time warranty after purchase. 10, Applicable to all people.