Sony MDR NC300D NOISE CANCELLING IN EAR HEADPHONES / earphones ?

Sony MDR NC300D earphones...RRP --£130 BARGAIN for only £65. Comes with all accessories expect box.. technical info: In-ear headphones with built-in Digital Noise Cancelling Built-in Auto Artificial Intelligence Noise Cancelling monitors S-Master full digital amplifier and digital sound enhancer technology 16mm Neodynmium driver unit Three sound modes (Movie, Bass and Normal)