Description: This phone with 30 requests for memorizing group numbers allows you to easily check information, so you don't any important message. Makes it use and not easy to fade. In addition, it also supports reminder function and one-key replay function. A good choice for you. Features: Crystal knob not easy to fade, sensitive reaction. Clearly indicates caller ID that use in office and home is more convenient. 30 group call number, you can long press the "call" button to quickly check the information. Two level volume button optional to control on the side, more intimate. Flash / anti-jamming function, more efficient and safer. FSK / DTMF standard call ID, never important information. Built-in 5 groups call and query call duration, reminder function and one-touch re-play function.