These do what you'd expect from Sennheiser. they cut out background noise and delivery nice audio wirelessly.
I replaced the 1/8in stereo cable with a ProCo 10ft cable. The sound was really nice at first, but when I changed that cable the sound improved even more!
I use these with a Hotone Purple Wind, HOF reverb in the loop, into an Apollo Twin. Fabulous!!
These are great for playing drums, as they will protect your hearing, while you listen to what ever it is your playing! Or playing in the room while tracking a loud guitar amp!