1The call center phone is equipped with an omnidirectional microphone to improve voice clarity and achieve excellent highquality sound. 2The microphone arm of the headset can freely rotate 330 degrees, and the very soft ear pads are suitable for 724 hours of high frequency use. 3It can be connected to an existing standard telephone jack without a battery, durable structure and rigid design extend the service life. 4You can talk, answer, and improve work efficiency without holding your mobile phone. 5The ringtone and earphone volume can be adjusted, so you can clearly hear the other party's voice even in a noisy environment. Item Type: Call Center Wired Telephone with Headset Material: ABS Compatible: For Office, Homez 1 x Telephone 1 xTelephoneHeadset 2 x Connection Cable 1 x Bracket 1 x Manual The volume of speaker phone and earpiece volume does not support adjustment.