1Equipped with an omnidirectional microphone, the call center phone is improved its voice clarity and achieve highquality sound. 2By adjusting the volume of ringtone and earphone, you can clearly hear the other party's voice even in a noisy environment. 3The very soft ear pads are suitable for 724 hours of high frequency use and the microphone arm of the headset can freely rotate 330 degrees. 4Without a battery, it can be connected to an existing standard telephone jack and for its durable structure and rigid design, it has extended service life. 5You can talk, listen, and improve work efficiency without holding your mobile phone. Item Type: CordedTelephone with Headset Material: ABS Application: Office Family and Others 1 xAttendant Telephone 1 xAttendant Headset 1 xConnection Line 1 x Bracket 1 xManual The volume of the speaker phone and earpiece does not support adjustment.