9107.00 - Time switches with clock or watch movement or with synchronous motor:

This HTS category, 9107.00, encompasses time switches that incorporate either a clock or watch movement, or are driven by a synchronous motor. These devices are designed to automatically control the operation of other equipment based on a predetermined time schedule. Examples include electromechanical timers used in industrial settings, residential appliances, lighting controls, and security systems. The defining characteristic is the inclusion of a timing mechanism that operates independently of the controlled equipment's power supply, ensuring accurate and reliable time-based activation or deactivation.

Unlike other categories within Chapter 91, which focus on clocks and watches themselves (intended for timekeeping), or parts and accessories for such timepieces, 9107.00 specifically targets the functional application of timing mechanisms in broader control systems. While sibling categories at the root level (like Chapter 01 headings for live animals) are entirely unrelated, within Chapter 91, this heading distinguishes itself by its *function* as a control device rather than a primary time display instrument.

The subcategories, 9107.00.40 and 9107.00.80.00, are based on the value of the time switch. This valuation-based subdivision is a common method in customs tariffs to differentiate goods for duty assessment purposes, reflecting potential differences in complexity, materials, or manufacturing processes associated with higher-value items. Importers must accurately determine the declared value of the time switch to ensure correct classification and duty payment.