Never used

Esperanza stereo headphones with microphone and volume control

Wearing style: Headband
Headset type: Binaural
Connection: 2 x 3.5 mm (MIC & EAR)
Microphone sensitivity: -42 dB
Microphone frequency: 30-16000 Hz
Headphone impedance: 32 Ω
Headphone frequency: 20-20000 Hz
Headphone sensitivity: 105 dB
Colour: Black

Never used. The headband have some peeling due to time reasons.