Brand New Yamaha HPH-200P monitor headphone
Bundled from Yamaha YUS3-SH silent acoustic piano. This is the same headphone as the HPH-200 despite a difference in packaging.
Comes with box and all accessories (unopened).
Not sure if 1 year warranty is inclusive for this headphone but copied invoice can be provided upon request.

Driver Type Dynamic, open air
Driver Unit Φ40 mm (1-5/8」)
Impedance 48 ohms
Maximum Input 1,000 mw
Sound Pressure Level 98.5 dB ±3 dB
Frequency Response 20 Hz – 20 kHz
Weight (without Cable) 180 g (6.35 oz)
Cable Length 2.0m
Connectors 3.5 mm (1/8)」 L-type mini stereo, 6.3 mm (1/4」) stereo

Retail price @ HKD 1,380.
Trade at TW Line.