Technical Information:

Impedance: 70 Ohm

Sensitivity: 101dB/mW

Amplifier requirement: Not really. But the fanboys will get mad if you plug it into your phone.

Detachable Cable: Yes

Target Headphone Loudness: 110,0 dB Sound Pressure Level

Power Required: 7,94 Milliwatts

Voltage Required: 0,7457 Volts

Current Required: 10,65 milliamps