The BT7610 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 an easy to read 1.8 inch full graphic display with an amber backlight and large easy-to-use buttons as well as caller display on each handset. The BT7610 also comes with a built in answer machine with 30 minutes recording time, so you'll never miss important calls. Please note: to block nuisance calls from the BT7610 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. Built-in handsfree speaker. Send text messages from your landline. Save up to 200 contacts that will automatically synchronise between handsets. Up to 50m indoor range and up to 300m range. Up to 12 hours talk and 120 hours standby time. Brand: BT. Model Number: BT7610. Analogue/Digital: Digital. Handset Quantity: 3. Answer machine: Yes. Talk Time: 12 hours. Voicemail Recording Time: Up to 30 mins. Wireless Range: Up to 50 m indoors, 300m outdoors. Directory: 200 name and number. Call Log: 50. Last Number Redial: 30. Polyphonic Ringtones: 10. Message Playback: Via handset and base. Product Colour: Black/Silver. SIM Card: No. SMS: Yes.