Skin moisture Intelligent detector designed for female! - The smallest skin moisture Intelligent detector in global; Play and plug and dose not need charging; - Let you know your skin moisture through APP and help you find the most suitable replenishment skincare; - It's the best gift for you and your girl friends - Download APP; - Connect detector with phone through 3.5mm connecter; - Softly press the TEST CONNECT on skin and after skin presses down the TEST CONNECT button wait for 5 seconds; - The test result appears. Supports Android 4.0 or over and ISO 6.0 over mobile phones.