[. . . ] English Product name: Active Speaker Design and specifications are subject to change without notice. [. . . ] Ώ When installing your Walkman on the speaker, keep the adjuster attached to the speaker. If the Walkman is installed on the speaker without the adjuster, the WMPORT of the speaker may be damaged. Press the VOL +/– button () on your Walkman to adjust the volume. Ά Hints  When you set [SP Output Optimizer] to [RDP-NWT18] (default setting) on your Walkman, the quality of the sound output from the speaker can be optimized. Only this sound quality setting is applied to the speaker, while other sound quality settings are not applied. Ώ For details on how to perform playback on your Walkman, refer to the “Help guide” supplied with your Walkman. Notes  You cannot use the FM radio function while your Walkman installed into the speaker. Ώ When operating your Walkman while it is installed into the speaker, brace it with your other hand. [. . . ] Do not use any type of abrasive pad, scouring powder or solvent, such as alcohol or benzene. [. . . ]