Product 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/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/Mute/ Pause function 6. Ringer High/Low/Off adjustable 7. Handset Volume high/medium/low adjustable Packing List: 1 * Big button Memory Telephone for old people 1 * Telephone Cable 1 * Handle 1 * Handle Cable 1 * user manual