The tester is a high precision skin moisture oil content analyzer which adopted the latest bioelectrical impedance analysis technology, it can guide you in having a professional skin nursing without any injuries.Feature: Made of high quality and eco-friendly material, durable, safe and sturdy to use. Can be used to test the skin moisture, skin oil and skin type. LCD display shows the percentage of moisture and oil content simultaneously. You just need press the SCAN button and wait for the result, easy to operate. Suitable for home, traveling, beauty salon and professional skin hospital. Speciifcation:Item Type: Skin AnalyzerMaterial: ABSOptional Colors: Pink, White(English Version)Measurement time: 3 secondsBattery: 1 x CR2032(Not Included)Weight: Approx.131-129gPackage list:1 x Skin Analyzer1 x English ManualInstructions:1. Press SCAN once, turn on the backlight and Bi signal sound, then the data flashes on the LCD display.2. After the LCD data is zeroed (this means that the dual LCD display shows 00.0%), we enter the test process.3. Position the probe perpendicular to your skin and close to you skin(remember to press the probe as much as possible.) After approximately 3 seconds of Bi tone, the LCD will also display the percentage of moisture and oil content.4. Press SCAN at anytime, it will enter the operation preparation process, and then you can retest your skin.5. After 20 seconds of testing, the backlight will turn off, if there is no any operation for 40 seconds, the analyzer will automatically shut down.