Panasonic KX-TGA100N Accessory Handset for KX-TG1000N and KX-TG1050N Expandable Phones (Champagne) 2.4 GHz digital spread spectrum technology Call waiting/caller ID with 50-station memory Backlit 4-line display on handset Headset jack and belt clip Standalone unit compatible only with Panasonic KXTG1000N and KXTG1050N