J1:buzzer mute; L/R:di/da or da/di F1 key can remember 60 words ,and it has -off protection fuction. F2 key can remember 50 words , it doesn't the data when the fails. R3 key is for speed control, speed getting fast when the value of R3 getting . Record: Keep pressing on F1 /F2 for more then half second, you will hear 'M', now it records 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 noe be recorded. Message : message can not only be storaged by a long memory, it also can be separate into parts by inputing EOM (End of Message)at of segmentation. Play the segmentations: If you want play the second segmentation, just press the memory key 2 ; if you want the third one, then press the key 3times, et cetera . mode:press F1 AND F2 at the time, you will hear "C",now it is under the mode of End mode: press F1 and F2 at time again, or you can input "D" by pressing the auto key When you 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 common . "C" and "E": Repeat play. it will stop automatically after playing 255 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 . 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 the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.