NightFlash cydia tweak is a LED/Panel light communication tool and flashlight.
It is helpful for climber.
Have many effect and Morse code to help them do light communication.
Basic : Continuous / Low / Middle / High Speed.
SOS : SOS signal.
Adjust : Adjust light time and dark time.
Effect : Many different flash mode.
Morse Character : Flash single Morse code character.
Morse String : Flash Morse code string.
Touch On : Touch button to open flash, release to close flash.
Others : You also can use volume-key to turn on/off led/panel. When you use panel-light, this method can protect your eyes. (It only works when panel is active)