Panasonic KX-TGA520M Extra Handset for 5200 Series Telephone Panasonic KX-TGA520M Additional Handset General Features: 5.8 GHz frequency hopping spread spectrum (FHSS) technology 4-line backlit LCD Charging base include Compatible Panasonic Phones: KX-TG5200 KX-TG5202 KX-TG5210 KX-TG5212 KX-TG5230 KX-TG5240 KX-FPG391 Regulatory Approvals: FCC