Mobile Speakers & Receivers PUI Audio Mobile Speakers and Receivers are designed for high-fidelity audio reproduction with the lowest profile possible. These speakers and receivers feature an IP67-rated face for protection against dust and water ingress when sealed within an enclosure. The speakers are available with either spring contacts for easy electrical connection or solder pads for lead wire connection, while the receivers have spring contacts. These PUI Audio speakers are ideal for cutting-edge mobile, Internet of Things (IoT), and Wi-Fi®-enabled applications. The receivers are optimized for high-fidelity audio reproduction in near-phone and headphone applications.