1The headset's microphone arm can rotate 330 degrees freely, and the extremely soft ear pads are suitable for 7x24 hours of high frequency use. 2You can talk, answer, and work more efficiently without having to have a mobile phone. 3You can adjust the ringtone and earphone volume, so you can hear the other party's voice clearly even in a noisy environment. 4Call center phones are equipped with omnidirectional microphones that enhance voice clarity and deliver superior, high-quality sound. 5It can be connected to existing standard phone jacks without a battery, and its durable construction and rigid design extend its useful life. Item Type: Wired Telephone with Headset Material: ABS Compatible: For Office, Home 1 x Telephone 1 x Telephone Headset 2 x Connection Cable 1 x Bracket 1 x Manual Speaker phone and headset volume does not support adjustment.