DCX400 DECT6.0 2-LINE Accessory Handset for DECT4000 series. * 2-LINE operation. Blue backlit keypad and display. Handset speakerphone. * NOTE: Will not operate without a compatible Uniden base. * Comes with: Accessory Handset. Charging Cradle. AC Adapter. Rechargeable Battery. Printed Materials. * 2-LINE DIGITAL DECT6.0 ACCESSORY HANDSET FOR DECT4000 SERIES.