Sony SPP-H273 Additional Handset for Sony Cordless Telephones SPP-S2720/S2730/A2770/A2780 (Discontinued by Manufacturer) Replacement handset 2.4GHz Digital Spread Spectrum Center Jog Dial control with 50-number dialing directory Three-line backlit LCD, lighted keypad Must be used with one of the following Sony phone systems: SPP-S2720, SPP-S2730, SPP-S2770, SPP-S2780