With storage and segmented memory function, common statements are used for storage. Only two buttons and a power switch for easy operation. Includes power-off protection, super energy saving. Adjustable speed switch, the potentiometer on the control board can be adjusted at any time. Power supply: 2 x AAA batteries (NOT INCLUDED) How to use: J1: buzzer mute L/R: di/da or da/di F1 key can 60 words, and it has power-off protection. F2 key can 50 words, it does not protect data when power off. R3 key is for speed control, fast speed when the value of R3 is low. Record: Press and hold F1/F2 for more than half a second, you will hear 'M', now it will record CW automatically. When it is finished, press F1/F2, you will hear \"S\". It will remind you with \"F\" if you volume up, and the extra part will be recorded. Message: The message can not only be stored in a long memory, it can also be separated into several parts by inputting EOM (End of Message) when segmenting. Play the segments: If you play the second segment, just press the memory key 2; if you the third, then press the key 3 times, etc. Mode: press F1 AND F2 at the same time, you will hear \"C\", now it is in the mode of End Mode: press F1 and F2 at the same time again, or you can input \"D\" by pressing the auto key Color: Black Material: Metal Package Contents: 1 * Morse Code Auto Memory Key Control The above package content only, 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 +/- 1-3 cm.