Brand New Black Color Euro-Style Series 1 This is NOT a universal handset. Please read the full description before buying. The VoIP Lounge, New Black replacement handset for Avaya Partner works with all Euro Series 1 phones: Partner 6, Partner 18, Partner 18D and Partner 34D and Merlin Magix 4406D+, 4412D+, 4424D+ and 4424LD+. Includes handset curly cord. *This is NOT a universal handset. It is designed specifically for the models of business phones listed above. This handset is NOT compatible with home phones or other makes and models of business phones.