Chapter 90 covers optical, photographic, cinematographic, measuring, checking, medical or surgical instruments and apparatus; precision instruments and apparatus; parts and accessories thereof. This chapter has an extremely broad scope, including everything from eyeglasses and microscopes to medical equipment and industrial measuring instruments. The core characteristic is that these goods are typically high-precision, high-technology products used for professional purposes such as measurement, inspection, analysis, control, or medical treatment. The chapter notes exclude certain specific items, such as tools for machines and separately presented electronic components. Heading 9030 covers oscilloscopes, spectrum analyzers and other instruments and apparatus for measuring or checking electrical quantities, but excludes electricity supply or production meters of heading 9028, and automatic regulating or controlling instruments and apparatus of heading 9031 and heading 9032. Specifically, it includes oscilloscopes, spectrum analyzers, multimeters (with recording device), communication test sets, etc. These instruments are mainly used to measure electrical signal parameters such as frequency, wavelength, voltage, current, etc. First 2 digits 90: indicates Chapter 90, covering optical, measuring, checking, medical and other precision instruments and equipment. Digits 3-4: 30 indicates heading 9030, specifically covering oscilloscopes, spectrum analyzers and other instruments and apparatus for measuring or checking electrical quantities. Digits 5-6: 40 indicates subheading 903040, specifically covering communication test sets, including vehicle communication test sets. This subheading is further subdivided into other communication test sets, but this code is for vehicle communication test sets. Note: The subheading division is based on function rather than application scenario; vehicle communication test sets are classified under this subheading due to their communication testing function. Vehicle communication test sets are used to test electrical signal parameters of vehicle communication systems, such as radio frequency, frequency, modulation, etc. They belong to instruments for measuring or checking electrical quantities and meet the description of heading 9030. They are different from measuring or checking instruments of heading 9031 (such as coordinate measuring machines) and from automatic regulating or controlling instruments of heading 9032. In addition, they are not communication equipment of heading 8517 but test instruments, so they are classified under 9030.

Product Name: The specific name of the declared commodity, which should accurately reflect the function of the commodity, such as 'vehicle communication test set'. Use: Explain the usage scenario of the commodity, such as for R&D, production testing, or maintenance testing of automotive communication systems. Function: Describe the main function of the commodity, such as measuring parameters of communication signals including frequency, power, modulation, etc. Brand: Fill in the brand of the commodity, such as Rohde & Schwarz, Keysight, etc. If no brand, fill in 'no brand'. Model: Fill in the specific model of the commodity, such as CMW500, UXM, etc., ensuring consistency with the actual item. Working Principle: Briefly describe the testing principle, such as measuring communication parameters through RF transceiver and signal analysis. With Recording Device: Indicate whether the instrument has data recording function, which affects subheading classification. Product Name: Vehicle Communication Test Set; Use: For RF performance testing of automotive communication modules; Function: Measuring frequency, power, modulation accuracy, etc.; Brand: Rohde & Schwarz; Model: CMW500; Working Principle: Transmits and receives signals through RF ports, analyzes communication protocols and RF parameters; With Recording Device: Yes. Misclassifying the test set under 8517 communication equipment, ignoring its testing function. Failing to distinguish whether it has a recording device, leading to subheading errors. Use description too broad, not reflecting vehicle communication, may be classified under other 9030 subheadings.

The core basis for classification is the function and use of the commodity. Vehicle communication test sets are mainly used to measure or check electrical signal parameters (such as frequency, power, modulation, etc.), meeting the description of heading 9030 'oscilloscopes, spectrum analyzers and other instruments and apparatus for measuring or checking electrical quantities'. Their vehicle application scenario does not change their essential nature as electrical quantity measuring instruments. At the same time, it must be confirmed that they do not belong to 9028 (electricity supply meters), 9031 (measuring or checking instruments), or 9032 (automatic regulating or controlling instruments). 903020 Oscilloscopes and oscilloscope plug-ins: 903020 specifically covers oscilloscopes, used to display electrical signal waveforms; vehicle communication test sets may include oscilloscope functions, but their main function is communication parameter testing, so they are classified under 903040. 903031 Multimeters (with recording device): 903031 covers multimeters, used to measure basic electrical parameters such as voltage, current, resistance; vehicle communication test sets have more complex functions targeting communication signals, so they are not classified here. 903039 Other instruments for measuring or checking electrical quantities: 903039 is a residual subheading under 9030 for electrical quantity measuring instruments not elsewhere specified; vehicle communication test sets have a dedicated subheading 903040, so they should be classified under 903040 rather than 903039. 903180 Other measuring or checking instruments: 903180 belongs to heading 9031, used for non-electrical quantity measurement or checking; vehicle communication test sets measure electrical signals, so they are classified under 9030. 851762 Communication equipment: 851762 covers communication equipment, used to transmit signals; vehicle communication test sets are test instruments and do not participate in communication transmission, so classification is different. Is the commodity used to measure or check electrical signals? Does it have communication testing functions? Is it used in a vehicle environment? Does it have a recording device? Are 9028, 9031, 9032 excluded?

Why is the vehicle communication test set classified under 903040 instead of 8517? 8517 covers communication equipment, used to transmit signals; while vehicle communication test sets are test instruments used to measure communication signal parameters, belonging to electrical quantity measuring instruments, so they are classified under 9030. How to determine whether a vehicle communication test set has a recording device? Check the instrument specification. If it has data storage and export functions, such as built-in hard disk or USB storage, it is considered to have a recording device. If it only displays in real-time, it does not. Must brand and model be provided during declaration? Yes, brand and model are important declaration elements that help customs confirm commodity classification and value. If no brand, fill in 'no brand'; the model must be accurate. Are vehicle communication test sets classified the same as ordinary communication test sets? Yes, they have the same function and are both classified under 903040. However, if an ordinary communication test set does not have a recording device, it may be classified under other subheadings under 903040, depending on the specific subheading structure. If the test set is only used for vehicle maintenance, is the classification different? The core of classification is function rather than use. As long as the function is to measure communication signals, whether used for maintenance or R&D, it is classified under 903040. What is the export tax rebate rate for 903040? Tax rates may change. Please consult the latest export tax rebate documents or consult customs. Generally, electromechanical instruments have a higher rebate rate, but the official rate shall prevail. How to describe the working principle during declaration? It should be concise and clear, such as 'through RF transceiver modules, measure parameters such as frequency, power, modulation of communication signals, and analyze the results'. Does a vehicle communication test set require 3C certification? 3C certification targets specific products, and test instruments are usually not in the catalog. However, it is necessary to confirm whether it is radio transmitting equipment; if it has transmitting functions, model approval may be required.