Panasonic KX-TG6592T + 3 KX-TGA659T - 5 Handset Cordless Telephone System 1.9GHz DECT 6.0 Panasonic KX-TG6592T + 3 KX-TGA659T DECT 6.0 Technology 5 Handset Cordless Telephone System 1.9GHz Frequency