Omega Freestyle Headphones With Mic - FH2020 

Size: 30 mm

Frequency range: 20-20,000 Hz

Impedance: 32 Ohm ± 15%

Speaker sensitivity: 105 dB ± 3 dB

Mic impedance: 2200

Mic sensitivity: -58dB ± 2dB

Microphone length 6cm Maximum power: 100mW

Standard operating voltage: 4.5V

Plug type 2x 3.5 Jack

Volume control with rotary knob

Cable length 1.8m

Dimensions 16.5 x 14.5 x 5.0 cm

Size adjustment + 2,5cm