Sennheiser HD25 PLUS Professional Monitor Headphones Camera Accessories which allows you to connect

which allows you to connect at distances up to 28 miles

Metal Housing -     Enables daily use for professional applications

and the Windjammer

The Yamaha 12 Channel Analogue Mixer plus SPX effects and USB Interface is a compact mixer capable of twelve simultaneous inputs that are ideal for performances

Sennheiser HD25 PLUS Professional Monitor Headphones Camera Accessories which allows you to connectThe Sennheiser HD 25 PLUS Headphone provides high quality audio in a lightweight and improved design. It can be used in several applications for monitoring, recording, DJing, and more. Featuring the same technical specifications and most importantly the sound as the original HD 25, the mechanical joint between the actual ear cups and the headband has been improved and its joints are now more solid, providing a smoother adjustment for a better fit.