Product description Features: 1. High quality ABS material, durable for long service life. 2. This big button phone is powered by telephone line. We dont need to install batteries it is energy saving and environmental protection. 3. Easy to install: just insert the coil cord and line cord plug and play. Functions: 1. Automatic checking of FSK or DTMF dual system. 2. Easy to install: Can be placed on the desktop. 3. 10 two buttons dial memories on digit 0-9 ( two touch memory ) 4.1 One button dial for SOS Emergency Call ( one touch memory ) 5. Flash, Redial or Mute or Pause function 6. Ringer High or Low or Off adjustable 7. Handset Volume high or medium or low adjustable Packing List: 1 x Big button Memory Telephone for old people 1 x Telephone Cable 1 x Handle 1 x Handle Cable 1 x user manual