The 2.5mm plug is used for following IP Phones:

Attention! ! ! ! !

This single headset has 3 kinds of plug like bellow， the RJ9 crystal plug，2.5mm plug， Dual 3.5 mm PC plug，so please leave a message which plug you need after your order，，otherwise I will default send the 2.5mm plug.

 

RJ9 RJ9 plug

             2.5                    2.5mm plug

3.5                                          Dual 3.5mm PC plug

 

Headset Features:

 

  • Noise-cancelling microphone filters out background noise， so voice transmission is exceptionally clear.

     

  • Flexible boom allows the mic to be positioned for optimal comfort and voice transmission. Swing-away feature lets you move the mic out of the way for beverage breaks.

  • Quick-disconnect feature provides an easy way to step away from the phone without disconnecting the call or even removing your headset. A 10-foot cord gives you a generous range while you\'re connected.

  • Crystal head connector can be replaced by a 3.5mm and 2.5mm plug.

  • Convenient to insert and draw the line with crystal head connector

  • Connector with ultrasonic quick plug QD line， easy to wear

  • New high-grade soft ear protector， comfortable to wear

  • Use special PCB(Printed Circuit Board) circuit， protect microphone speaker and prevent hearing being impaired

  • Equipped with noise canceling microphone， to remove microphone noise， background noise and ensure the call clear and loud.

  • Adopt new imported materials and unique appearance

  • Two Mute Switch and Adjustable Volume.

Technical Parameter:

 

 Driver Unit

 1×30mm

 Frequency Response

 20-20kHz

 Impedance

 150  ohm

 Sensitivity

 125dB

 Max input power

 10mW

 Plug

2.5mm

Cord Length

 1.8mm Coiled cable

 

 

 

251

251-4N

261-16

 

MIC

Noise reduction points at microphone to ensure the other party hear clear.

Excellent sounding voice， full and nature.

261

 

Volume adjuster

Rotate to the left (VOL+) to increase the volume of the receiver and rotate to the right (VOL-) to decrease the volume.

 

95-3


 Microphone’s mute switch:

If the switch is flipped to the right (MIC ON)， the conversation can take place normally. If the switch is flipped to the left (MIC OFF)， the user’s voice cannot be heard by the caller. This switch can be used for the conference calls that need the microphones to be switched off for a long time

251-6N

The QD line is 1.5m long (and 2.5m when it is stretched). The product is equipped with the sound controller (the volume adjustment knob and the microphone’s double electronic mute switches， making the product highly suitable for the long-lasting telephone conferences and business calls)

 

261

Volume adjustment can make the control of sound easily; comes with a mute button， facilitates internal discussion， and without affecting the other party.

2.5

2.5mm plug is used to the telephone that has the socket. Such as Polycom Phone.

 

The 2.5 plug QD cable can be replaced. 3.5mm plug and RJ11 connector is available in our store.So you can employ the product with different devices by choosing different plugs as below picture shows.

Below cables link are for your choosing，Thanks.

Pls click below picture，

 

 

 

Pls click below pictrure，

QD

 

Provide 15 days return， 1 month replacement and 2 years maintenance warranties.

 

 

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