The F.R.E.Q. M by MadCatz is a 2 channel gaming headset, which uses a 40mm - Neodymium driver. It uses a 3.5mm and Bluetooth connection with a 1.4m cable. This delivers a frequency response of 20Hz - 20kHz and a sensitivity of 106 dB/V. It also has a Built-in microphone.
Mad Catz' F.R.E.Q.M Wireless Mobile Gaming Headset delivers clear stereo audio for gaming and media on your mobile devices and PC or Mac, and utilizes a host of advanced technology to improve smartphone conversations. Boasting compatibility with Apple products and Bluetooth audio-enabled devices, the F.R.E.Q.M Wireless is an extremely intelligent headset.