PUI Audio Slim-Line (15mm x 11mm) Micro Speakers are built for space-limited, modern electronics such as smartphones, tablets, laptops, as well as wearable technology and IoT devices such as WiFi®-enabled thermostats. The Slim-Line speakers are available offering both spring contacts and solder pad mounting options and feature a resonant frequency below 600Hz for realistic sound. PUI Audio Slim-Line Micro Speakers include 4 unique parts featuring IP65-rated waterproof faces. PUI Slim-Line Micro Speakers are also available in 18mm x 13mm speakers that build on the performance of the 15mm x 11mm size while reducing the overall thickness to below 3mm or 3.1mm with spring contacts. These 18mm x 13mm speakers feature a 320Hz resonant frequency and are also available with IP65-rated faces.