High quality voice communication with noise cancellation;
FSK/DTMF caller ID display, automatic checking;
30 Groups 16 digits incoming number memories;
5 Groups 16 digits outgoing number memories;
Backlit in-use indication, Backlit blinks when ringing;
Turn on by auto/hand for incoming call with LED indication;
Microphone mute function with LED indication;
2 levels headset volume control;
Flash time 100ms or 600ms choice to meet the different PABX machines;
Provide the voice recorder port, can use for training or connect to the PC to record;
Power save function;
Provide GD500 headset.
