http://www.mennegat.nl/nl/product.php?artid=484
Elevated from a standard audio playback device, the DN-F400 is a 1U/HE, half-rackspace unit designed for background music, message on hold, repetitive messaging, crisis management, or any application requiring audio to be running continuously or triggered at a moments notice.

The optional RC-F400 Remote Controller features a large LCD display and enhances the DN-F400s capability by providing an ergonomically designed, intuitive control unit for instant playback of audio or audio elements (sound effects) via its hot-buttons, making it ideal for live productions like sporting /
performance events, radio, television and theatres. Adding the RC-F400 to any DNF400 makes it a simple, cost-effective alternative to expensive radio and theater Sound FX systems. (less info)