Telephone, Landline Telephone, One-Key Function Office Hotel Apartment for Home 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. make it use and not easy to fade. What's more, it also support callback function and one-key function. A choice for you. Features: Crystal button not easy to fade, sensitive . 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. /anti-jamming function, more efficient and safer. /DTMF standard caller ID, never miss important information. Built-in 5 group call number and call time query, support callback function and one-key function. Specifications: Weight: 295g Recording function: None Number storage function: None Interface Type: RJ-11 Color: Red, Silver, Blue, White optional Package List: 1 x Telephone 1 x Telephone Cable 1 x Telephone Handle Wire 1 x Chinese User Manual Crystal button that is sensitive and resistant to fading Clearly displays caller ID for convenient use in both office and home settings Stores up to 30 group call numbers for easy inquiry; long press the "call in" button to quickly access information Features two optional volume control buttons located on the side for personalized sound levels Equipped with an anti-jamming function for enhanced efficiency and safety