The Hands-Free Headset with Comfort Fit Headband is designed for use with any cordless phone possessing a standard 2.5mm jack, Such as Panasonic Phones. The headset is an excellent way for you to talk hands-free while you work. Its boom-style microphone adjusts to an optimum level for your mouth. The headset is reversible you may wear it on either ear and it uses a comfortable, lightweight design and offers a 5-foot cord with a cable knob controling the voice.
There is a volume adjustment button of this headset. When comes to problems of this feature about the headset, please kindly inform customers to plug all jacks correctly and adjust the volume. If jacks are not plugged correctly and firmly or the volume is under mute, then the sound issue will happen.
Note: It is 2.5mm. It just works for Panasonic Desk Phones and some 2.5mm Cordless Phones.