... ,notebook headset 1 year warranty. headset,stereo headset,usb headset,pc headset,ear headset,notebook headsetSpeaker: Φ40mm Dynamic type Sensitivity: 105dB ... +/- 3dB (at 1K Hz ) Freqency Response: 20Hz-20, 000Hz Max Input Power: 100mW Cable Length: 2.5m +/- 0 ... Plug Type: Φ3.5mm Stereo headset,stereo headset,usb headset,pc headset,ear headset,notebook headset