Motorola SD7502C 5.8 GHz Digital Color Expansion Handset for 7500 Series (Dark Silver) Start with a Cordless Phone Base and then customize your home communication system with up to 12 "Connect To" system phone functionality 5.8 GHz digital FHSS with multi-component capability Accessory handset used with SD7500 series 128 x 128 4k color display w/ theater style fading backlight