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 and Metal Probe Color: White Voltage: 3V Memory Function: 10 Test Results Powers Supply: 2 x AAA Batterys (Not Included) Item Size: 140 x 35 x 27mm or 5.51 x 1.38 x 1.06in Item Weight: 47g or 1.66ounces Package Size: 140 x 138 x 70mm or 5.51 x 5.43 x 2.75in Package Weight: 245g or 8.64ounces Package List: 1 x Skin Tester 1 x Base 1 x User Manual