The BT3960 Nuisance Call Blocker Trio offers long-range reception, blocking up to 50 numbers, and a 10-hour talk time. It features an easy-to-read screen showing message indicators and allows for volume adjustment. The phone also supports a second call waiting feature. Specifications include dimensions of H:23.5 x W:8.1 x D:12.9 cm, a black color, and a 1-year guarantee. Batteries are required, and it is made of plastic. The model number is 76774. This model includes a one-touch do not disturb function, a backlit screen and keypad, and a digital answer machine with 12 minutes of recording time. Please note that Caller Display service subscription from your network provider is necessary for nuisance call blocking, text messaging, and visual voicemail features. Charges may apply.