1. Precise: probe testing for faster and more accurate results. With accurate data, you can master your skin condition in real time and carry out skin care accordingly. 2. Historical Data Query: When this skin tester is turned on, press the power button for 3 seconds to query historical data, allowing you to have a deeper understanding of your skin condition. 3. Simple Appearance: The skin test pen adds a universal base to make it more convenient to use. Simple and elegant appearance is more attractive. 4. Smart Reminder: When the green light of the tester is on, it means please continue to hold. When the is on, it means that the skin is dry and needs to be replenished in time. When the yellow light is on, it means that the skin moisture and oil are saturated, please keep this state. 5. Smart Display: Test skin moisture, oil and elasticity, the upper display shows the moisture value, the lower display shows the oil value, the smile face in the upper right corner represents soft skin, and the sad face in the lower right corner represents rough skin. Spec: Item Type: Facial Skin TesterMaterial: ABS Test Head: test head Applicable Scene: Home Battery: 2pcs AAA battery (Battery Not Included) Package List: 1 x Base 1 x Facial Skin Tester 1 x ManualPortable and bring with you---light weight and small size, the pores and skin tester is designed like a pen, lightweight and clean to carry, you could check your skin circumstance whenever, anywhere. Clever reminder: when the green mild of the tester is on, it means please retain to preserve. when the Light is on, it approach that the skin is dry and wishes to be replenished in time. when the yellow light is on, it way that the skin moisture and oil are saturated, please preserve this kingdom. Convenient Portable-: it's also quite handy to use this facial pores and skin water oil detector pen, it is powered by 2pcs aaa battery (battery not covered), so there may be no cord wished, and compact size and light-weight allows you to easily carry and shop in luggage, you can use whenever and everywhereYou want. Smart Reminder---: When the green light of the tester is on, it means please continue to hold. When the is on, it means that the skin is dry and needs to be replenished in time. When the yellow light is on, it means that the skin moisture and oil are saturated, please keep this state. Smart Reminder---: When the green light of the tester is on, it means please continue to hold. When the is on, it means that the skin is dry and needs to be replenished in time. When the yellow light is on, it means that the skin moisture and oil are saturated, please keep this state. Clever reminder when the green mild of the tester is on it m Clever reminder when the green mild of the tester is on it m.