Easy to use Big Button Twin pack amplified volume telephones. Audio boost dedicated key +35dB. Adjustable ringer up to 90dB. Smart call block key, 2 modes manual or automatic. Call block list for 100 entries. 3 direct memory keys on handset and on base. Hands free operation. Time on screen and call timer. Visual riger. Hearing aid compatible Features: Audio boost dedicated key: +35dB Adjustable Ringer: up to 90dB Smart call block key; 2 modes Manual or Automatic, Call block list = 100 entries 3 direct memory keys on handset and on base Hands free operation Visual Riger Time on screen and call timer Hearing aid compatible Specifications: Dimensions: H:18.0 x W:8.0 x D:9.0 cm Colour: Black Guarantee:2 years Material: Plastic Model Number: AP3457