This looks to be a good price on a decent pair of mid-range on-ear headphones, obviously not in the same league as the WH-1000XM4's and the like, but priced accordingly as well.
Also available in Blue at the same price if that's your preference - https://www.ebay.com.au/itm/SONY-EXTRA-BASS-Wireless-On-Ear-...
Cheapest elsewhere appears to be $129 + shipping at Dick Smith - https://www.dicksmith.com.au/da/buy/sony-extra-bass-headphon...
Or if you really like throwing your money away they're still $249 at Myer - https://www.myer.com.au/p/sony-sony-whxb700b-wireless-on-ear...
Full details about the headphones can be found at https://store.sony.com.au/archived-headphones/WHXB700B.html
BE SMARTER WITH VOICE ASSISTANT
Manage your day by connecting to your smartphone voice assistant through the headphone's built-in mic. Enjoy entertainment, connect with friends, get information, listen to music and notifications, set reminders, and more.
EXTRA BASS FOR DEEP, PUNCHY SOUND
As part of the EXTRA BASS range from Sony, the WH-XB700 headphones enhance all your low-end frequencies for exceptional bass, yet keep vocal clarity, lifting every track with wave after wave of thundering rhythm.
NFC AND BLUETOOTH FOR INSTANT CONNECTIVITY
Near Field Communication (NFC) and Bluetooth technology remove the need for wired connections and complex set-up sequences. Simply touch your NFC-enabled device to the headphones for a quick, seamless connection, then start streaming your music collection. No NFC? No problem. Connect via Bluetooth and you're ready to go.
SLEEK DESIGN AND LONG-LISTEN COMFORT
Whatever your look, the simple, sleek, sophisticated design of the WH-XB700 headphones with a one-colour vivid accent on the bass housing is the perfect match. Soft cushioned ear cups offer long-lasting comfort and a swivel design make them ideal for listening to your favourite albums, back-to-back.
CUSTOMISE YOUR SOUND
Set the perfect sound for every song. The innovative Sony | Headphones Connect app lets you customise your bass levels and gives you presets for club, hall, arena or outdoor style sound.
LONG BATTERY LIFE FOR NON-STOP LISTENING
A charge of around 4 hours gives you all day power with approximately 30 hours of play time, so you can keep on listening, track after track, mix after mix.
QUICK CHARGING WHEN YOU'RE PRESSED FOR TIME
If your headphones are running low on power, a 10-minute quick charge will give you up to 90 minutes of play time. Ideal if you're rushing around from place to place.