Story's gadgets part 1

As a textbook student, Story had used the knowledge she gained through mountains of books to mix and match magic with science and created some useful contraptions that processes her magic and creates certain special effects through it.

1. Image repeater
At the size of a 3cm by 7cm by 3cm rectangle, Story could use it to record an image including sound and project it as a hologram on loop or otherwise to a maximum of 5 posts (10 hours in storyline). Could be activated with a push of the right button or delay-activated via countdown settings. The image repeater had to be still when recording and playing otherwise the images would be disrupted or even cancelled. Could not playback images bigger than 10m in radius.
Element types - Light, Sound.

2. Octave whistle
A small whistle with an estimated overall size of 4cm³, the device had a string attached to allow it be worn like a necklace and gears embedded that could be specifically tinkered to produce different frequency ranges when blown according to its adjustments. The conversion itself would require magic, but it is manually refilled before blowing rather than during, and requires very minimal energy.
Element type- Sound.

3. Silent walker  
A spell cast specifically on shoes and other footwear to cancel out noises made during walking, but would not cancel out the noise if the user deliberately makes noise via stomping or kicking. Lasts 5 posts (4 hours in storyline) per cast.
Element type - Sound.

4. Endless pen  
A pen that depends on the user's magic to refill itself so that it will never jam or run out of ink.
Element type - Ink.

All approved. However Silent Walker and image repeater can only last for 5 post at the max then the cool down rate kicks in.