Siemens 8800 Gigaset 2.4 GHz Accessory Handset for 8825 Cordless Phone For use with the Siemens Gigaset 8825 phone system 2.4 GHz digital spread spectrum frequency-hopping technology Digital speakerphone and headset jack for hands-free options Supports caller ID with call waiting Range of up to 150 feet indoors, 1000 feet outdoors