Source: Unearthed Arcana 7 - Modern Magic
Transmutation cantrip (technomagic)
Casting Time:
1 action
Range:
60 feet
Components:
V, S
Duration:
Instantaneous
This cantrip allows you to activate or deactivate any electronic device within range, as long as the device has a clearly defined on or off function that can be easily accessed from the outside of the device. Any device that requires a software-based shutdown sequence to activate or deactivate cannot be affected by On/Off.