Audio Technica G1WL Wireless Gaming Headset $233 (Free C&C) or + Delivery @ JB Hi-Fi

JB Hi-Fi's RRP says $389 but these usually go for around $339-$399 mark at Scorptec, MWAVE, CentreCom, etc..

Headphones
Type: Closed-back dynamic
Driver: 45 mm
Sensitivity: 101 dB/mW
Frequency response: 5 to 40,000 Hz
Impedance: 45 ohms
Power supply: DC 3.8 V lithium polymer battery
Weight: Approx. 290 g (10.2 oz) / Approx. 297 g (10.5 oz) (including detachable microphone)

Microphone
Type: Electret condenser
Polar pattern: Hypercardioid
Sensitivity: -43 dB (1V/Pa, at 1 kHz)
Frequency response: 30 to 20,000 Hz

Transceiver
RF output: 12.5 mW EIRP
Maximum communication range: Line of sight - approx. 12 m (39’)
Frequency band: 2.404 GHz to 2.476 GHz
Modulation method: AFH
Transmission band: 20 to 24,000 Hz
Power supply: DC 5 V (USB BUS POWER)
Dimensions: 18 mm (0.71”) × 55 mm (2.17”) × 10 mm (0.39”) (W × D × H) (without connector)
Weight: 9 g (0.32 oz)

Specifications for computer connection (operating environment)
Supported operating systems: Windows 7, Windows 8.1, Windows 10 (32/64 bit), macOS High Sierra, Mojave
Supported USB port: USB 2.0, USB 3.0

Other
Charging time: Approx. 7 hours*
Operating time: Continuous transmission time: Max. approx. 15 hours*
Operating temperature: 5 °C to 40 °C (41 °F to 104 °F)

The Audio Technica G1 Gaming Headset (Wired) version is going for $167 as well (RRP $279)