Seems like the cheapest as of the moment.
Information taken from a previous deal.
Frequency Response: 20Hz – 40,000Hz
Impedance: 32 Ohms @ 2.5kHz
Sensitivity: 109 dB (± 3 dB)
Drivers: Custom 50mm neodymium, matched pairs
Impedance: 2.0k Ohms
Frequency Response: 100Hz – 10,000Hz
Sensitivity: -42 dB (± 2 dB)
Type: CORSAIR SLIPSTREAM WIRELESS 2.4Ghz
Connector: USB Type A
Range: Up to 60 feet (12m)
Battery Life: Up to 20 hours
USB Charging Cable: 1.5m
3.5mm Stereo Cable: 1.5m