The ATH-WS99BT Bluetooth headphones showcase Audio-Technica's Solid Bass technology. With the dedicated design of the 53mm driver, not only does the WS99 deliver in deep, punchy bass, but the mid to high frequencies are expressed with clarity and precision.Driver: 53mm
Sensitivity: 102dB / mW
Playback frequency: 8 ~ 25,000Hz
Maximum input: 1,000mW
Impedance: 37 ohms
Communication system: Bluetooth standard Ver.3.0 + EDR compliant
Output: Bluetooth standard Power Class2
A precision machined aluminum housing eliminates unwanted vibrations, for a thick sound reproduction that avoids muddiness. The ATH-WS99BT also uses Bluetooth 3.0 coupled with a high quality internal headphone amplifier so you can enjoy your music with no strings attached.