Uniden DCX170 Additional Cordless Handset for D1700 Series Phone System This handset is designed for use with Uniden's D1760, D1780, D1785, and D1788 bases. DECT 6.0 Technology - 1.9GHz Corded / Cordless Phone Combo Expandable Up To 12 Handsets Hearing Aid T-Coil Compatible Wall Mountable/Mount Included