High resolution touch screen LCD GUI makes it extremely user-friendly with easy access to features Built-in Communication Assistant software Multiple screens for accessing a variety of key features Easy Navigator key Full duplex speakerphone 48 programmable soft keys USB port Ethernet port Headset jack PoE (Power over Ethernet)   6-line backlit display 4 x 12-self labeling, flexible CO buttons Digital Speakerphone 2 Ethernet ports (100 Base-T) Power-over-Ethernet (PoE) Bluetooth® module (option) 6-line backlit display 24 flexible CO buttons Digital Speakerphone 2 Ethernet ports (100 Base-T) Power-over-Ethernet (PoE) Bluetooth® module (option) Add-on 12-key module (option : KX-NT303) or add-on 60-key module (option : KX-NT305) 3-line backlit display 24 flexible CO buttons Digital Speakerphone 2 Ethernet ports (100 Base-T) Power-over-Ethernet (PoE) Bluetooth® module (option) Add-on 12-key module (option : KX-NT303) or add-on 60-key module (option : KX-NT305)   1-line display 8 flexible CO buttons Digital Speakerphone 2 Ethernet ports (100 Base-T) Power-over-Ethernet (PoE) KX-NT303B: 12 additional programmable key module KX-NT305B: 60 additional programmable key module Compatible with IP models: KX-NT343B and KX-NT346B