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VFD of "Single tube" type was reproduced on iPhone among display devices that were called VFD(Vacuum Fluorescent Display) = fluorescent character display tube and it made it to the clock.
It is a clock that used the VFD tube of atmosphere the re-different from Nixie tube.

- The following four kinds of single tubes are reproduced.
･DG19E(ISEDEN)
･DG10B(ISEDEN)
･DG10H(NEC)
･LD8063(NEC)

- Color selection
The following eight colors can be selected besides the figure color of normality.

Pink, red, orange, yellow, green, blue green, blue, and purple

- Background color selection

The background color can be selected according to three colors (black, dark gray, light gray).

- Display ON/OFF on a day of the week

- 24 time displays ON/OFF

- First "0" display ON/OFF (example)"07:17:34" →"7:17:34")

- Setting at self-locking time (individual when drive battery/charging it)

- Alarm setting

The following alarm set can be added.
･Alarm effective/invalidity
･The alarm name can be given.
･Setting at start time
･Alarm sound (Roaster, bell, bird, electronic, music 1, music 2, and iPod music)
･Repetition
･Volume setting
･Vibration ON/OFF
･Compulsion sound reproduction ON/OFF (Whether the setting of the silent pictures switch is disregarded or not: When the iPod music reproduces, it is invalid).

- Correspondence schedule
･IOS4 multitask (backing ground operation)
- By all means in the next release though the backing ground operation was not in time in this release.