The Skin Sensor is designed to test the skin moisture, skin oil and skin type, and also can be used to detect the fluorescer. Features: 1. Made of high quality and eco-friendly material, durable, safe and sturdy to use. 2. Can be used to test the skin moisture, skin oil and skin type, and also can be used to detect the fluorescer. 3. With 10 groups memory function, it is convenient for you to consult the value that you have test the last time. 4. With the warn of skin moisture shortage, keeps you aware of your current skin condition. 5. Highly sensitive probe offers more precision of the testing result. 6. Stylish and portable with compact pen-type design, good for home, traveling, beauty salon and professional skin hospital. Specification: Condition: 100% Brand New Item Type: Skin Tester Material: ABS Color: Pink Size: approx. 12.3 * 3.5 * 2.5cm / 4.8 * 1.3 * 0.98inch Weight: Approx. 172g / 6.1oz Function: can be used to test the skin moisture, skin oil and skin type, and also can be used to detect the fluorescer. Package list: 1 x Skin Tester 1 x USB Cable 1 x Manual The reference value of skin moisture: (the normal moisture value should be greater than 32, or else the tester will emit red light to remind moisturizing) Forehead: normal value is 35% -60% Eye: normal value is 50% - 60% Face: normal value is 35% - 60% Hand: normal value is 40% - 65% The reference value of skin oil: The moist skin: 16% - 22% Normal skin: 23% - 33% Oily skin: 34% - 63%