Coding for home appliances and digital products uses a three-layer structure: product code (which model), outer carton code (which carton), and serial number (which unit). Each layer serves its own purpose, so after-sales and channel management can be precise down to the individual unit.
The example is a GTIN-13 in the 69 prefix range (including the mod10 check digit). Outer cartons use ITF-14, and serial numbers are managed by the company's own system.
Serial Numbers and Packaging Levels — match the right layer first, then look at the solution.
The product code identifies the model, while the serial number identifies a single unit. Mixing them up makes after-sales tracking fail.
Without hierarchical coding, the warehouse only knows there is stock but not which unit it is, leading to frequent serial number mix-ups.
The identity of a single unit cannot be traced, so there is no basis for subsidy verification or residual value assessment.
In home appliance scenarios, barcodes are a "hierarchical coordinate": GTIN identifies the model (product item), ITF-14 identifies the full carton, and the serial number identifies a single unit — the three layers stack together so inventory, goods, and units all align.
Identifies the product item (model / specification).
Outer carton logistics identifier, corresponding to the contained model.
The device serial number is managed by the enterprise's own system, in parallel with the product code.
Choose barcode types by scenario, and don't pay for capabilities you won't use.
| Barcode symbology | Form | Purpose in this scenario |
|---|---|---|
| GTIN-13 | Device product code | Model-level identifier, used for channel record creation and settlement. |
| ITF-14 | Outer carton code | Full-carton logistics identifier. |
| Serial number | Own system | Individual unit identity, the basis for after-sales service and redemption. |
All barcode types can be found inBarcode Tool CenterTruly generated and verified before printing.
Directional comparison; specific current rules shall prevail.
| Level | Identification | Purpose |
|---|---|---|
| Product (model) | GTIN-13 | Channel record creation, price comparison, settlement |
| Logistics (full carton) | ITF-14 | Scan on inbound / outbound, corresponding to the contained model |
| Individual unit (serial number) | Enterprise-owned | Installation, after-sales, trade-in redemption |
| Platform | GTIN + serial number specification | Some scenarios require serial number information (subject to platform rules) |
The carrier and registration method of the serial number are determined by the enterprise itself; for matters involving platform or subsidy redemption, the corresponding rules shall prevail.
All on-sale models + specification variants are listed as product items.
GTIN-13 + ITF-14 applied as a pair.
Align serial number rules with warehousing / after-sales systems.
Carton codes for inbound, unit codes for outbound; hierarchical data must be complete for after-sales to be accurate.
The whole-unit serial number system runs in parallel with product codes: model, full carton, and individual unit are aligned across three levels, enabling after-sales to pinpoint the exact unit.
Manufacturing enterprises such as Skyworth and Insta360.
Provide a SKU list by model; if serial number rules need to be aligned with channels, confirm the specifications in advance.
The total fee usually includes: the coding service fee charged by the member organization (based on tier and number of years) + agency service fee. Factors affecting the fee: SKU scale, number of number segments required, and whether additional matters such as changes / transfers are included.
Once the materials are complete, the review and allocation process begins. Timelines vary by member organization.
No new code allocation is involved, so the process is relatively simple
Unified ledger management, with each milestone synchronized item by item
The above is a description of the process sequence and does not fabricate specific numbers of days; the actual timeline is subject to the current public notices of the accepting institution, and each milestone will be synchronized during processing.
Tmall / JD.com / Amazon / Douyin
Outer carton and pallet labeling
European, American / Southeast Asian / Middle Eastern markets
Magnification Factor · Color · Placement
Describe the product category and sales channel, and the coding consultant will provide the corresponding solution for this scenario.
