- Corded Desktop Phone System- 4-Line Operation- Speakerphone- Monochrome LCD Display- Ringer Indicator- 8-Step Speakerphone Volume Control- 7-Step Ringer Volume Control- 99 Number Redial Memory- Hold- Music on Hold- Mute- Flash- Handset Locator- 10 Ringer Pattern- Wall Mountable- Headset Jack- Multiple Language Support (English / French / Portuguese / Spanish)- Not Stand Alone Item: Must Pair w/ KX-TGW420B