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