Product description Features: 1. Apply the world-leading Bio-Sensor technology. 2. Keeps you aware of your current skin condition. 3. Comes with Moisture Reference Guide for all seasons. 4. Simple operation; Stylish and portable with compact pen-type design. 5. Powered by 2* AAA batteries; Good for home, traveling, beauty salon and professional skin hospital. Specifications: 1. Operating temperature: 5-40? 2. Operating relative humidity: <70% 4. Measurable Moisture range: 0~99.9% oil range: 0~99.9% 5. Dimension: 128*26*34mm 6. Power supply: 2* AAA batteries (not included) Package Contents: * 1 X Neon Digital Analyzer for Skin * 1 X User Manual