Panasonic KX-TGA470S Extra Handset for KX-TG77XX Cordless Phones Series, Silver Extra Handset for: KX-TG7733S, KX-TG7732S, KX-TG7742S, KX-TG7743S, KX-TG7745S, KX-TG7741S, KX-TG7731S DECT 6.0 Technology Doesn't work without parent model Amplified Handset Volume with Dedicated Volume Key Digital Answering Machine - Not Included