Driver diameter: 40 mm Sound Pressure Level: 117 dB Resonance Frequency: 90 Hz Impedance: 32 Ohm Rated power: 30 mW Max power: 70 mW Diaphragm: Titanium coated Magnet: Neodymium Weight: 0.59 lbs / 270 g

COMES WITH S02 speaker units H02 headband E02 earpads C02 Coiled 1.5m (expandable to 3.2m) cable 1/8" to 1/4" screw-on adaptor

https://aiaiai.dk/headphones/tma-2/presets