This is an official Technics app. This app makes it even easier to connect and configure your EAH-AZ70W, EAH-AZ60, EAH-AZ40, and EAH-A800. By linking with a set of Technics headphones that are compatible with the app, your music listening experience becomes even more appealing. Technics Audio Connect enables you to enjoy the following kinds of functions. ・ Guiding connections with smartphones and tablets ・ Customizing various settings ・ Accessing the Online manual ・ Updating firmware ・ Compatible models - Technics EAH-A800(New) - Technics EAH-AZ60(New) - Technics EAH-AZ40(New) - Technics EAH-AZ70W Please understand that we will not be able to contact you directly even if you use the “Email Developer” link.