Features: Skin Detector: Used to measure skin moisture, skin oil and skin elasticity, allowing you to monitor skin moisture.? Metal Probe: Adopts metal probe, averts the influence of residual liquids of skin care products on detection. Memory Function: Records the last ten test results, you can press the power-on button for 3s to check the historical data. Easy to Use: Just turn skin tester on, put the probe on your skin and see the skin condition with real data. Convenient Carrying: Cute and portable with a compact pen design, can be put in handbag easily. Specifications: Material: Plastics Body + Metal Probe Color: White Voltage: 3V Memory Function: 10 Test Results Powers Supply: 2 * AAA Batterys (Not Included) Item Size: 140 * 35 * 27mm / 5.51 * 1.38 * 1.06in Item Weight: 47g / 1.66ounces Package Size: 140 * 138 * 70mm / 5.51 * 5.43 * 2.75in Package Weight: 245g / 8.64ounces Package List: 1 * Skin Tester 1 * Base 1 * User Manual