NuTone LA600WH Universal Wired/Wireless MP3 Doorbell Mechanism, White N/A Imported MP3 upload capabilities and programmable Molded plastic cover is paintable to blend perfectly in whatever room you mount it in High quality digital audio sound, with 128MB of memory Audio controls allow you to select the volume desired and a 5, 10 or 20-second or full song operation time Wired or wireless installation choices; required separate transformer for wired install, not included.