Skin Water Test Meter [Superior Material]Made of high quality and environmentally friendly material, , safe and solid to use.[Multiple Functions]Can be used to test skin moisture, oil, elasticity; can be used to test environment temperature and humidity; with the fluorescer function, can be used to test the fluorescer.[Smart Memory Function]8 groups of the latest test results can be saved for later check by pressing the "O" button.[Highly Sensitive Probe]Highly sensitive probe provides more precise test result. 1 button operation presents more convenient using experience.[Handy Size]Stylish and portable in compact pen design. Mini size makes it good for home, travel, beauty salon and professional skin hospital. [Superior Material]Made of high quality and environmentally friendly material, , safe and solid to use. [Multiple Functions]Can be used to test skin moisture, oil, elasticity; can be used to test environment temperature and humidity; with the fluorescer function, can be used to test the fluorescer. [Smart Memory Function]8 groups of the latest test results can be saved for later check by pressing the "O" button. [Highly Sensitive Probe]Highly sensitive probe provides more precise test result. 1 button operation presents more convenient using experience. [Handy Size]Stylish and portable in compact pen design. Mini size makes it good for home, travel, beauty salon and professional skin hospital. [Large LCD Display]With backlight, you can check it even in the dark place. Large LCD display for more convenient and readable using. [Fluorescer Detector Light]Long press the "O" button, the bottom light turns on for detector. [Temperature and Humidity Detector]Short press the ON/OFF button instantly enters the detector of temperature and humidity. Power supply: USB Battery capacity: 300mAh Voltage: 3.7V Charging time: . 2hours Colour:White Material:plastic Package Contents: 1 x Skin Water Test Meter 1 x Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.