Siemens 4000 Gigaset 2.4 GHz Supplementary Handset (Silver with Black) Supplementary handset and charger Transforms your cordless phone into a multiuser cordless system For use with Siemens models 4010, 4015, 4200, 4210, and 4215 Range of 150 feet indoors, 1,000 feet outdoors LCD with onscreen menus and caller ID/call waiting