Model: BS-4004
* Call center phone with caller ID function
* Incoming call max up to 30 groups in 16 digits
* Outgoing call max up to 5 groups in 16 digits
* LED indicator for Ringer
* LED indicator for MUTE function
* Ringer volume control: LOW/HIGH/OFF
* Flash time 100ms/600ms selectable
* LCD brightness adjustment
* Headset speaker volume switch
* Flash, Pause, Delete function
* ON/OFF button
* Redial last number function
* FSK/DTMF compatible
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