Phone Number Store: This telephone with 30 group call number storage inquiry allows you to check the information at ease, which ensuring you never miss inportant message. you can long press the "call in" button to quickly check the information. Caller ID Display: With caller ID display functon, FSK/DTMF standard caller ID, never miss important information. Built in 5 group call number and call time query. Multi functional: Two optional level volume button to control on the side, more intimate. Lightning/anti jamming function, more efficient and safer. Support callback function and one key replay function. Elegant Design: Simple but elegant design makes it be an idea decoration unit. Crystal button not easy to fade, sensitive . A good choice for your home or office. After sales Service: If there are any using problems or unsatisfactory with our products, please feel free to contact us, our professional customer service team will reply you within 24 hours, and we will consult the issues with sincerity. Thanks for purchasing from us.