It looks like a pretty good deal on a decently reviewed pair of headphones (and not to be confused with the base level JBL Everest 300, which doesn't feature noise cancellation). Below is the listed set of key features (hyperbole included at no extra cost)
• Connect to any Bluetooth enabled device for amazing sound quality without the hassle of wires
• These On-Ear headphones are ergonomically designed to fit the unique contour of your ears, you will experience unprecedented comfort
• For the first time, JBL combines the immersive experience of active noise cancelling technology and lets you control the amount of outside noise to let in
• With the press of a button, TruNote Technology automatically calibrates the sound of the headphones uniquely for you
• Experience greater simplicity and a longer battery life with the auto off feature which powers the headphones off automatically when not in use
• Built in microphone with echo cancellation technology delivers natural sounding calls
JB Hi-Fi has the same model in black and red for $299 - https://www.jbhifi.com.au/headphones-dj/headphones/jbl/jbl-e...
The lowest on Amazon is US$153 + shipping - https://www.amazon.com/dp/B01D0CEM9E/sr=8-3/qid=1494189450/r...