VTech 2420 Accessory Cordless Handset, Silver/Black | Requires a VTech 2421, 2431, or 2461 Expandable Phone System to Operate Supplemental handset, battery, and charging unit For VTech VT2461, 2431, and 2421 Built-in speakerphone 2.4 GHz band for improved signal quality 1-year warranty