Features 1、Made of high‑quality environmentally friendly materials, durable, safe and solid. 2、It can be used to detect skin moisture, skin type, and can also be used to detect fluorescent agents. 3、Remind the skin of insufficient moisture and let you know your current skin condition. 4、Stylish and portable compact pen design, suitable for family, travel, beauty salon, etc. 5、10 groups of memory functions, convenient for you to query the value of the last test and the highly sensitive probe provides more accurate test results. Specification Condition: 100% Brand New Item Type: Skin Moisture Tester Material: ABS+PC Battery Type: 2 x AAA batteries (NOT INCLUDED) Skin Moisture Reference Value: The normal moisture value should be greater than 32%, otherwise a red light alarm will be issued to remind you of water replenishment during detection. Forehead: Normal value: 35%-60% Eyes: Normal value: 50%-60% Face: Normal value: 35%-60% Hand: Normal value: 40%-65% Skin Oiliness Reference Value: Moist skin: 16%-22% General skin: 23%-33% Oily skin: 34%-63% Skin Elasticity Description : The five smiling faces on the screen correspond to rough, slightly rough, general, slightly flexible, and flexible Function and Effect: 1. Measure skin moisture. 2. Test skin oil. 3. Test skin texture. 4. 10 groups of memory function. 5. Skin water shortage reminder. 6. Fluorescent agent detection. Instruction: 1. Press the power button, a red and green light will be displayed in cycles. After turning on the probe, touch the probe to the tested part, the screen will start to scroll, and a beep will indicate the end of the measurement and the result will be displayed. 2. After the test is completed, the backlight will be off for 10 seconds, and it will automatically shut down after 4 minutes without operation, or press and hold the power button for 3 seconds. Fluorescent Agent Detection Pen Instruction: Press the 0 button for about 3 seconds in the power-on state, the tail light of the machine will be on, and the detected object will be illuminated. The blue glowing one contains fluorescent agent. This machine has 10 sets of test records. To query, touch the 0 button to query the last test record. Each time you touch the 0 button, the record will be displayed in a loop from the last to the tenth time. Package List 1 x Skin Moisture Tester 1 x Instruction