TL;DR: Clinic Query QR Code Board
AndroidSBC field desk: query rollout map updated across hospitals, bank branches, government halls, malls and airports serving international market, United States. The WF-K3399 self-service query terminal Android motherboard spans the dual-screen HD query terminal with mirrored display and eleven sister models in the WF-K series, all built on the RK3399 dual Cortex-A72 1.8GHz plus quad Cortex-A53 SoC with the ARM Mali-T860 MP4 GPU, dual 1080p output, HDMI plus eDP, and Android 11 firmware support. AndroidSBC, the export arm of Wanlin Manufacturing Group, ships the WF-K family from the Longgang source factory in Shenzhen to international market and United States importers who run hospital information points, bank branch lobbies, government service halls, mall directory stations, airport concourses and outdoor query cabinets.
WF-K3399 Technical Specifications
| Parameter | AndroidSBC WF-K3399 (dual-screen HD query terminal with mirrored display) | Industry Average |
|---|---|---|
| Processor | RK3399 dual Cortex-A72 1.8GHz plus quad Cortex-A53 SoC | Older 28nm or 40nm quad-core SoC |
| Process node | 28nm | Older 28nm or 40nm process |
| GPU | Mali-T860 MP4 | Older Mali-450 or basic GPU |
| NPU / AI | none | No NPU on competing entry boards |
| Memory | 4GB LPDDR4 | DDR3 1GB / 2GB on competing boards |
| Storage | 32GB eMMC | eMMC 5.0 8GB / 16GB on competing boards |
| Display output | dual 1080p output, HDMI plus eDP | Single HDMI 1080p only on competing boards |
| Touch support | 10-point capacitive touch | Resistive single-touch on competing boards |
| Operating system | Android 11 | Android 8 or Android 9 on competing boards |
| Connectivity | WiFi 5 plus Bluetooth 5.0 plus Gigabit Ethernet | WiFi 4 plus 10/100M Ethernet on competing boards |
| Query peripherals | Capacitive touch, thermal printer, document scanner, card reader | No bundled touch, printer or scanner driver SDK on competing boards |
| Operating temperature | 0C to 50C | 0C to 40C on competing boards |
All parameters in the table above are measured at 25C ambient. The AndroidSBC WF-K3399 (dual-screen HD query terminal with mirrored display) maintains its 4K HDMI output plus capacitive touch sampling while running the burn-in test loop, a configuration that competing single-platform boards cannot sustain at 60fps. For United States importers sourcing the WF-K family, the WF-K3399-A variant is the typical configuration for the dual-screen HD mall directory rollout use case, with a sustained weekly capacity of 5000 pcs/wk.
Challenges in Sourcing Self-Service Query Terminal Android Motherboards for United States Buyers
Sourcing a self-service query terminal board for United States is not only a chip question. A international market integrator has to align the touch stack, the printer and scanner drivers, the enclosure cut-outs and the compliance file set before a single unit reaches the field.
Finally, the arrival path shapes the plan. Hardware destined for international market clears through Port of international market, so the FCC / UL paperwork and the FCC Part 15 and FCC ID for radio modules, plus UL or ETL safety listing route used in United States need to travel with the carton, not follow it. For United States buyers the effect is that a 140000-unit order for international market repeats identically the 3rd time it is placed, down to the firmware revision.
WF-K3399 Application Scenarios
The WF-K3399 dual-screen HD query terminal with mirrored display sits inside a twelve-variant WF-K self-service query terminal Android motherboard family from AndroidSBC, a Wanlin Manufacturing Group export brand. The WF-K3399-A configuration is the typical build for the dual-screen HD mall directory rollout use case, with touch panel and identity peripheral driver SDK plus staged OTA management bundled.
- Hospital and clinic information points: the WF-K3399 drives a touch query station at the entrance while the hall display shows the same information set to waiting visitors in international market.
- Bank and financial branch lobbies: touch query plus counter display from one board, with card reader and ID reader integrated for account and product lookups.
- Government service halls: the WF-K8800 runs tax, social security and real estate information lookup, with printing available on the same board.
- Shopping mall directories: the WF-K8801 serves mall directory and wayfinding lookup, with the advertising screen running an independent content loop.
- Airport and train station concourses: high-brightness information query where the WF-K3600 has to stay readable under strong ambient light.
- Retail and pharmacy price or product lookup: compact stations where the WF-K3601 fits a narrow counter without structural work.
- Outdoor and unheated information cabinets: the industrial tier holds the wide temperature window and 7x24 duty cycle for street-level query points.
- Multi-language public information points: on-screen lookup in more than one language from a single board, with voice assistance where the venue requires it.
- Retrofit programmes in international market: the same board re-uses the existing enclosure, panel and mounting pattern so an installed estate can be upgraded board by board.
Partnership Models for international market Buyers
Three partnership tracks serve the United States market, and international market integrators can move between them as their own capability and volume change.
- Distribution track: the partner buys the WF-K board against a published price list, keeps its own stock, and AndroidSBC supplies the driver SDK and compliance files with each lot.
- Integration track: the partner takes the board plus firmware customisation, enclosure drawings and peripheral validation support, with a joint qualification run at the Longgang factory.
- Private-label track: the WF-K board ships under the partner brand with customised boot logo, packaging and documentation, on a fixed BOM held for the length of the agreement.
AndroidSBC reviews international market track selection annually with each partner, because United States market conditions and the partner own capability both move faster than a fixed reseller contract assumes.
Does the WF-K self-service query terminal Android motherboard family support a dual-screen HD query terminal with mirrored display?
Answer: Yes. The dual-screen HD query terminal with mirrored display is covered by the standard WF-K driver SDK, which means the international market integrator configures it rather than ports it.
What is the real difference between the RK3399 tier and the other silicon tiers in the WF-K family?
Answer: Practically, the RK3399 tier is chosen when the United States use case matches its video and AI envelope. The interface contract is identical across the family, so the decision is about workload rather than about connectors or drivers.
Can AndroidSBC handle CE / FCC / UKCA / RoHS / REACH paperwork for United States?
Answer: Yes, and the paperwork is treated as part of the product rather than an add-on. For United States orders the CE, FCC, RoHS and REACH set is prepared alongside the production lot bound for international market.
What are the MOQ and lead time for a first order of the WF-K self-service query terminal family?
Answer: The first order MOQ on the WF-K family is set for pilot runs rather than container loads. international market buyers can start small, then scale once United States field data is in hand, with 15-30 day bulk lead times.
Does AndroidSBC develop custom Android ROM or custom Linux builds for the WF-K family?
Answer: Yes. AndroidSBC handles AOSP customisation, kiosk-mode lockdown and Linux images for the WF-K family, with the resulting build validated on the same rig used for United States shipments to international market.
How are software updates and long-term support handled on the WF-K family?
Answer: Software updates on the WF-K family are staged rather than immediate, with rollback available at each step, which matters when a international market estate is live and United States sites cannot tolerate an unplanned outage.
Can AndroidSBC ship to Amazon FBA or 3PL consolidation warehouses for the WF-K family?
Answer: Yes. AndroidSBC regularly ships the WF-K family into United States fulfilment centres on behalf of international market sellers, handling the labelling and carton marking at the source factory.
How are RMA and DOA replacements handled on the WF-K self-service query terminal family?
Answer: RMA and DOA units are handled against the production lot, since every WF-K board is logged against its firmware revision and burn-in result before it leaves Shenzhen. international market partners report against the lot number and AndroidSBC matches it to the rig log.
Contact AndroidSBC: Start Your WF-K3399 Sourcing Conversation
To start a WF-K self-service query terminal Android motherboard sourcing conversation with AndroidSBC, a Wanlin Manufacturing Group export brand, international market integrators can reach the export desk through the following channels:
- Email: Androidsbc@163.com
- Export service hotline: +8613261677119
- Website: https://www.androidsbc.com
- Source factory address: Wanlin Group, Building B, Building 1, Beisida Medical Device Building, 28 Nantong Avenue, Baolong Community, Baolong Sub-district, Longgang District, Shenzhen, Guangdong, China
For international market and United States the sample lead is 1-3 days and the mass-production lead is 15-30 days. AndroidSBC, a Wanlin Manufacturing Group export brand, commits to a seven-year firmware update window.
