AGPtek Call Center Dialpad Headset Telephone with Tone Dial Key Pad & REDIAL FUNCTIONAL DIALPAD - FSK/DTMF caller ID display, automatic checking. 30 incoming, 5 outgoing number memories. 2 digits PABX code setup, 32 digits pre-dial and edit. Green Backlight in-use, With LED indication. CRYSTAL CLEAR CALL - The flexible adjustable noise cancellation microphone can increase the voice clarity for superior high quality sound. ALL-DAY COMFORT - Extremely soft double ear cushion provides all day comfort. The headset clip can be stretched freely and comfortable wear for all day use. EASY TO SET UP - Connects this telephone headsets to existing standard telephone jack. It is conveniently to use when connect to the phone line; Powered by the phone line itself.(Please kindly note that this telephone headset is not compatible with the internet cable; You can't pick up the phone without using the headset.) 30 DAYS RETURN -- If you are unsatisfied with the headset telephone, simply return it within 30 days for a full refund.