Features 1、Crystal button not easy to fade, sensitive reaction. 2、Clearly shows caller ID that office and home use is more convenient. 30 group call number storage inquiry, you can long press the "call in" button to quickly check the information. 3、Two optional level volume button to control on the side, more intimate. 4、Lightning/anti‑jamming function, more efficient and safer. 5、FSK/DTMF standard caller ID, never miss important information. Built‑in 5 group call number and call time query, support callback function and one‑key replay function. Specification Description: This telephone with 30 group call number storage inquiry allows you to check the information at ease, which ensuring you never miss inportant message. High quality make it use and not easy to fade. What's more, it also support callback function and one-key replay function. A good choice for you. Features: Crystal button not easy to fade, sensitive reaction. Clearly shows caller ID that office and home use is more convenient. 30 group call number storage inquiry, you can long press the "call in" button to quickly check the information. Two optional level volume button to control on the side, more intimate. Lightning/anti-jamming function, more efficient and safer. FSK/DTMF standard caller ID, never miss important information. Built-in 5 group call number and call time query, support callback function and one-key replay function. Specifications: Weight: 295g Recording function: None Number storage function: None Interface Type: RJ-11 Color: Red, Silver, Blue, White (optional) Package List: 1 * Telephone 1 * Telephone Cable 1 * Telephone Handle Wire 1 * Chinese User Manual