The External Memory Keypad consists of a control keypad and a 1m cable. The YAESU Keypad offers five memories for pre-recorded messages in different operating modes. This is especially useful in contests, but can also be used for any CQ call or other standard text. These memories are available for CW, RTTY and SSB, and can normally be recalled via the touch screen. However, since you usually want to display something else on the screen, this extension offers the possibility to recall the eight memories with an external keyboard. This makes it much easier to run a contest or work through a pile-up. Features/ Technical Specifications: Provide voice storage memory Support SSB/CW/RTTY three modes Recall stored recordings directly without taking up screen space, saving a lot of time during contests. Product Name: YAESU External Memory Keypad Product weight: 50g Size: 44*18*69 mm + 1m cable Storage Channel: 5 Support Mode: SSB/CW/RTTY Suitable for: FT891, 991A, FTDX10, FTDX101MP NOTE: For more information refer the user manual - Here