Product description:
The 40mm speaker provides a powerful sound output. Both 3.5mm and 2.5 mm audio jack pins are included for universal compatibility. Headset type: binaural; headset style: over the head; earpiece type: ear cushion; earpiece material: leatherette.

• Compatible with devices that have a 3.5mm or 2.5mm jack audio port, computers (pc/mac), smartphones and tablets, ios or android and desk phones with audio jack.
• Comfortable and sturdy with retractable headband.
• Powerful 40mm wide-band bass enhanced speakers.
• Noise canceling microphone.
• 3.5 mm and 2.5 mm jack headset.