9105.91.40 - With opto-electronic display only

This HTS category, 9105.91.40, specifically covers "other clocks" that are electrically operated and feature an "opto-electronic display only." This classification applies to timekeeping devices not specifically listed elsewhere in heading 9105, provided their primary means of displaying the time is through an opto-electronic interface such as an LED or LCD screen. Examples might include digital alarm clocks with only a digital display, or wall clocks primarily designed for digital time presentation.

This category is distinguished from its sibling, 9105.91.80 ("Other"), by the explicit requirement of an opto-electronic display. The sibling category would encompass other electrically operated "other clocks" that do not solely rely on an opto-electronic display, such as those with analog dials driven by electric motors or mechanical movements.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification at this level is determined by the presence of an opto-electronic display as the sole time-indicating mechanism on an electrically operated clock falling under the broader definition of "other clocks" within heading 9105.