PRODUCT DESCRIPTION Aftermarket Earpiece Speaker with Proximity Sensor Cable For iPhone 11 Pro Max (Warning: Irreparable Face ID Functionality) (Aftermarket) The sensor is supposed to sense when your face is close and shut the screen off, while the earpiece speaker controls the sound during a call. If both of these parts are broken then making a phone call could be difficult. Repair your iPhone 11 Pro Max so you could get back to making normal calls once again. We highly recommended for professional Installation. All Parts are tested before Shipping.