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 fast when the value of R3 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. It will 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 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 . mode:press F1 AND F2 at the same time, you will hear "C",now it is under the mode of End 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 , and "?" for invalid . "A" :turn off the memory of long-short voice. "B" :turn on the memory of long-short voice. This is the most common . "C" and "E": Repeat play. it will stop automatically after playing 255 times under the 'E' mode. You just press the short voice auto key if you want to turn it off. Press it again, after keyer making the judgement of "R", it will be over. "C" can't automatically, but it can be used as a sign. You just press the short voice auto key if you want to turn it off. Press it again, after keyer making the judgement of "R", it will be over. "D" ends the mode, and goes back to common mode. "T" transfer , it lasts for ,then goes back to mode. if you press auto key or memory key during T'S 30s, it will stop, and goes back to common mode. color: black Material: metal Package Contents: 1pc Auto Key controller (AAA battery is not included) Only the above package content, other products are not included. Note: Light 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.