Ha0021, Wired Analog Home, Corded Call Center Headset Telephone From Telpal, It is a desk model headset telephone for landline phones in office and home business in the USA and Europe. Compatible with most of call center telephone equippment and digital telephone service. It also can be in home on a regular phone jack. Receiving call, making call, reviewing, calling back and deleting incoming numbers. Easy to Set ;There is no special equipment to set this phone up, and it will comes with an English manual. Comfortable blue backlight caller ID display with the best viewing angle, automatic checking of FSK/DTMF, 30 incoming, 5 outgoing number memories. It has the basic features of a landline telephone headphones,and does not have to be merged with other phones: Flash, Mute...and it runs solely on a land line. No need batteries. Headset speaker volume control by knob. Flash time 100ms or 600ms choice. Voice recorder port available, can connect to the PC to record, recording cable not included. The headset is fully adjustable and fits very comfortable; Provides all day comfort, clarity and durability, Superior quality sound with the flexible adjustable noise cancellation microphone.