MX-K2 CW Keyer Automatic Key Controller Morse Code Auto Memory Key Controller for Radio Amplifier With storage and segmented memory function, commonly uses statements for storage. Only two buttons and a switch for easy operation. Includes power-off protection function, super power saving. Adjustable speed switch, the potentiometer of the control board can be adjusted anytime. Power Supply: 2 x AAA Batteries (NOT Included) How to use: J1:buzzer mute L/R:di/da or da/di F1 key can remember 60 words ,and it has power-off protection fuction. F2 key can remember 50 words , it doesn't protect the data when the power fails. R3 key is for speed control, speed getting fast when the value of R3 getting down. Record: Keep pressing on F1 /F2 for more then half second, you will hear 'M', now it records CW automatically. When it is all done, press F1/ f2, you will hear "S". It will remind you by "F" if you exceed the volume, and the extra par t will noe be recorded. Message : Every message can not only be storaged by a long memory, it also can be separate into several parts by inputing EOM (End of Message)at the end of every segmentation. Play the segmentations: If you want play the second segmentation, just press the memory key 2 times; if you want the third one, then press the key 3times, et cetera . Command mode:press F1 AND F2 at the same time, you will hear "C",now it is under the mode of command End command mode: press F1 and F2 at same time again, or you can input "D" by pressing the auto key Colour: black Material: metal Package Contents: 1 * Morse Code Auto Memory Key Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.