1)Capacity: 3lines,8extension  

2) Built-in PC Program                                                    
System can be programmed by both SLT or PC Software.

3) External Music:                                                        
Built-in exernal music port.Allow the user connect any available music for on-hold

4) Optional Switch & backup Power                                          
System support the Switch power 80~240VAC,50~60Hz. And connect external battery for backup 4~8hours when power fails.

5) Optional Door Opener                                                    
System support unlimited universal door phone and opener.

6) Optional Caller ID transfer display & Charge System