IKey Smart Key Quick Button Dustproof Plug for Andriod Smart Phone & Tablet PC 3.5mm Headphone Headset Dust Plug (Silver) Compatible with most Android 4.0 or above devices No complex ''unlock, home, apps, open an app'' any more Compatible with Huawei P6 and Glory series, HTC One, Xiaomi MI2, Xiaomi MI3 Press and open an app on the locked screen directly and quickly Press button, a smart and cool gadget designed for customizing shortcuts