100% authentic, from official store. Also registered for warranty with no issues. Within box also contained a bonus Razer gold card. Received in 3 days from day of purchase.
I have seen so many headphones but not as great as Razer Blackshark! I love how the headband is made of sponge which is comfortable for prolonged use. The ear pads are also made of sponge and are super squishy and soft for the ears which are again really good if you use it for long hours. Also tried out the headphones to test the audio quality and wow I could really hear a difference when the surround sound is enabled. The item came properly wrapped with dust bags and I am really impressed with the quality they provided. Would definitely recommend and patronise Razer again!
Have not tried yet. Hopefully it performs as per what the rest mentioned