Features Large Storage Capacity : ZLarge storage capacity makes it possible to store many words, which will surely meet all the storage needs. The Morse code keyer has segmented storage and data protection, bringing more convenience to the storage. Also, the command mode makes cw keyer easier to send the words stored inside, and the repeat play mode is also very convenient. Paddle Key Supported: Code Keye does not support straight key. it only works with a paddle type key and it works well. the soled of sending can be adjusted by the nab. it takes the paddle input directly and output to your transiver in other plug. you can also pair up with a cw decoder and see what you send. works well. The power-off function will not only perfectly protect the data inside, but also saves the battery for long use.Battery: 2 x AAA Battery ( not included) Specification: Item Type: Morse Code Keyer Product Material: Aluminium Alloy Product Model: MX-K2 How to Use: Battery: 2 x AAA Battery ( not included) J1: Buzzer mute.  L/R: di/da or da/di F1 key can remember 60 words, and it has power-off protection function. 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 part will not be recorded. Message : Every message can not only be stored by a long memory, it also can be separate into several parts by inputting EOM (End of Message)at the end of every segmentation. Play the Segmentation: 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, etc . 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. When you use the auto key, PIC will make a judgement: you will hear "R" for the right command, and "?" for invalid command. Package List: 1 x Morse Code Keyer 1 x User Manual Package List 1 x Morse Code Keyer 1 x User Manual