NEC DTK-24D-1 BK 24-Line Button Digital Monochrome Digital Terminal Display Phone Features - 165x58 Pixel Monochrome Tilting Display - 24 Programmable Keys with Red, Green and Amber Statius LEDs - 4 Context Sensitive Soft Keys - 10 Fixed Feature Keys - 4 Way Navigation Pad - Full Duplex Speakerphone - RJ9 Headset Jack - 5 Position Tilt Base - Integrated Wall Mount - Full Duplex Speakerphone - Narrow Band Audio - Supports Optional Key Add-On Module Compatibility - *******Compatible Systems******* - NEC SV9000 Series Systems (SV9100, SV9300, SV9500)