"Description:Main Features: Lock and unlock your Smart phone or tablet quickly， hide the app when you leave your smart phone alone. Share & Transfer information (send the private message/Picture/business card/ website link to the person you want to share by a simple touch) Control Applications (you can write a fixed process list ahead of the time， and the ring will start the applications each time by simply touch. Water Resistant and No charging required Support All Android and Windows NFC Mobiles.Specifications:Size:10Material: Stainless Steel+RhinestoneChip: Dual NFC Chip WirelessDistance: 1.5cmWaterproof Level: IP68Suitable Device: For Android Phones With NFC Function， For Windows Phones With NFC FunctiPackage Including:1 x Smart RingNote:1. Due to the light and screen difference, the item's color may be slightly different from the pictures.2. Please allow 1-2 cm differences due to manual measurement.