HIMS Braille Sense U2 User Manual page 275

The "Set speed" option allows you to set the audio playback speed.
The speed level ranges from 1 to 10. The default setting is the 5.
If you change the value, press "Space" or "Backspace." The higher the
number, audio playback speed is fast.
The "Time index" option allows you to set time to jump. The default value
is set to 1 minute. The values are "5 seconds", "10 seconds", "30
seconds", "1 minute", "3 minutes", "5 minutes", "10 minutes", "15
minutes", "20 minutes", "30 minutes" and "1 hour." You can change the
value by "Space" or "Backspace."
Also you can change the value of time index by pressing "dot 2" or "dot
5" without calling this option. And if you press "dots 2-5", you can hear
the current time index.
After changing time index, if you press "dot 1" or "dot 4", you can jump to
previous or next position by time index. For example, time index is set to
1 minute. And if you press "dot 1", you can jump to previous position by
1 minute. And if you press "dot 4", you can jump to next position by 1
minute and then listen to audio file.
To save the changed settings and exit from this dialog box, press "Enter"
after you change all the options you want to change, or move to the
"Confirm" button by pressing "Space-4-5" or "Space-1-2" repeatedly, and
then press "Enter." If you want to cancel the changes, and exit from this
dialog box, press enter on the "Cancel" button, or press "Space-e (dots
1-5)" or "Space-z (dots 1-3-5-6)."
9.3.6.3 Record Settings Dialog Box
If you press enter on "Record Settings" in the "Settings" menu, or press
"Backspace-s (dots 2-3-4)" in the "Media player" dialog box, the Braille
Sense U2 will display the "Record Settings" dialog box, which contains
"Recording type," "Sample rate" option, "Bitrate" option(only when
recording type is mp3), "Bits per channel" option(only when recording
type is wav), "Line in mode" option, "Set folder," "Confirm" button and a
"Cancel" button. You can move between controls by pressing "tab