The BT7600 Nuisance Call Blocker gives you more Call Control so you can filter the calls you want to take and block the ones you don't. It has a large easy to read display, great sound quality, and tons of easy to use features. Your phone is an important way of staying in touch with the world and keeping your independence. But sometimes, receiving unwanted, repeat or international sales calls can cause problems. So BT have developed Call Control, a service that lets you filter the calls you want to take and block the ones you don't, to help you get the most from your phone. Please note: to block nuisance calls from the BT7600 phone, you will need the Caller Display service enabled from your network provider. Charges may apply. Easy to read 1.8" full graphic dot-matrix display with amber backlight. Greater call control with options to block calls by specific numbers or call types.