What ⏽ means
It means the equipment is switched on.
A 1984 computer manual and a 2004 standards document show ⏽ in this equipment-control setting. In 2002, guidance from the Institute of Electrical and Electronics Engineers (IEEE) distinguished general power from the more specific states on, off, on/off, and sleep. These marks belong to a standardized family of equipment controls.
A technical control label; in ordinary text, it reads as a literal reference to device power.
Don't read ⏽ as the broader power or standby mark; it means ON.
Don't confuse it with
1Questions people ask
1Why does ⏽ appear as a box?
A font issue: the font being used may not include ⏽, so the app substitutes an empty box. A font that includes the character can render it.
How to type ⏽
⏽\23FDCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.