Item Type: Facial Skin Tester Function: 1. Test Skin Moisture Content 2. Test Skin Oil Content Host Battery Type: 1 x CR2032 Button Battery (Delivery with Button Battery) Button Battery Capacity: 210mAh Package List 1 x Skin Tester 1 x Manual 1Main Application: Using true biosensing technology to make accurate measurement of water content of your skin. 2Easy Carrying: Comes with a compact size and light weight, you can put our skin tester in your bag and use it at any time. 3Easy Operation: Press the measurement button, and you are able to measure the skin situation instantly. Very convenient 4LED Display: There is a LED screen to show the specific value of the situation. You can easily monitor and record the change. 5Gifts for People: This skin tester is very practical, you can give it to mommy, friend, girlfriend, people who love skin care, they will love it.