Specification: Item Type: Skin Water Oil Analyzer Material: ABS Color: White Battery type: Lithium Ion (shipped with built in battery) Battery Capacity: 150 mah How to Use: Press the On key to start the detector. Touch the skin for more than 3 seconds. The skin status is displayed on the screen. Package List: 1 xSkin Water Oil Analyzer 1 x USB Cable 1 x Instruction BookSUITABLE SCENARIOS : By measuring skin and oil levels, you can easily customize your skin care products. It's an essential tool for anyone looking to keep their skin looking and radiant. Suitable for salon and home use. MATERIAL : The test probe of this product is made of skin-friendly material, which is non-invasive and gentle on the skin to ensure accurate results. 3-COLOR INDICATOR LIGHT : Clearly shows your skin condition. Green indicates a balance of and oil, while red indicates dryness. Yellow indicates water and oil saturation. SMART CHIP : The power is increased to 60%, saving time while accurately measuring skin and oil levels. SMART ANALYSIS : With smart sensors, it only takes 3 seconds to sense the skin and oil level and analyze its condition.