| Storage | 16GB eMMC (128GB Max) |
| MIPI | 31-pin FPC MIPI-DSI interface|1920x1200 resolution |
| TF Card | Push-push type TF card slot(128GB Max) |
| Indicator Light | Standby indicator (red) and working indicator (green) |
| Structure Compatibility | Compatible and interchangeable between models K0/K2/K3/K4 |
| USB Host | 1x USB3.0, 1x USB 2.0 (external), 1x USB3.0, 6x USB 2.0 (internal) |
| Ethernet | 10/100/1000Mbps adaptive Ethernet port |
| Operating Temperature | 0℃- 70℃ |
| RTC | Low power RTC with a CR1220 battery |
| Bluetooth | BT V4.0 |
| GPU | Quad-core Mali-T860 |
| Wi-Fi | 802.11 b/g/n/ac |
| System Memory | 2GB(or 4GB optional) LPDDR4 |
| 12C | 1x l2C interface |
| CPU | Rockchip RK3399, dual-core Cortex-A72@1.8GHz, quad-core Cortex-A53@1.4GHz |
| HDMI Input | Supports 720P or 1080P |
| Button | Burn/power buttons |
| Thickness | 9mm |
| 4G/3G | 1x Mini PCle 4G port; 4G/3G expandable module; Nano-SIM card connector (push-push type) |
| LVDS | Dual-LVDS interface, up to 1080p resolution |
| Mic | Differential input |
| USB OTG | 1x USB Type-C port |
| DC Input | 12V DC socket (9V-15V wide voltage) |
| HDMI | HDMI 2.0, up to 4K output |
| Power Amplifier | 8 ohms, 6W dual audio power amplifier output |
| EDP | Dual-EDP interface, up to 1080P resolution |
| Line Out | Left/ Right channel output |
| Android | 7.1 (recommended), 8.1 (optional) |
| Backlight | Backlight control interface that turns the backlight on/ off and adjusts the brightness level |
| Dimensions | 135mmx 95mm |
| Delivery Time | 5-8 work days |
| Serial Port | 1xTTL/RS-232,1xTTL/RS-232/RS-485, 4x TTL/RS-232 expansion ports |
| Linux | Ubuntu18.04, Debian 9, Buildroot+ QT 2018.02 |
| Payment Terms | T/T |
| Supply Ability | 200+/day |
| Packaging Details | |
| Headphone | 3.5mm jack (supports HPD) |
| Humidity | 0%-95% (non-condensing) |
| GPIO | 8x GPIO ports |
| IR | IR pin header |
| Brand Name | |
| Model Number | K4 Mainboard |
| Place of Origin | China |
View Detail Information
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Product Specification
| Storage | 16GB eMMC (128GB Max) | MIPI | 31-pin FPC MIPI-DSI interface|1920x1200 resolution |
| TF Card | Push-push type TF card slot(128GB Max) | Indicator Light | Standby indicator (red) and working indicator (green) |
| Structure Compatibility | Compatible and interchangeable between models K0/K2/K3/K4 | USB Host | 1x USB3.0, 1x USB 2.0 (external), 1x USB3.0, 6x USB 2.0 (internal) |
| Ethernet | 10/100/1000Mbps adaptive Ethernet port | Operating Temperature | 0℃- 70℃ |
| RTC | Low power RTC with a CR1220 battery | Bluetooth | BT V4.0 |
| GPU | Quad-core Mali-T860 | Wi-Fi | 802.11 b/g/n/ac |
| System Memory | 2GB(or 4GB optional) LPDDR4 | 12C | 1x l2C interface |
| CPU | Rockchip RK3399, dual-core Cortex-A72@1.8GHz, quad-core Cortex-A53@1.4GHz | HDMI Input | Supports 720P or 1080P |
| Button | Burn/power buttons | Thickness | 9mm |
| 4G/3G | 1x Mini PCle 4G port; 4G/3G expandable module; Nano-SIM card connector (push-push type) | LVDS | Dual-LVDS interface, up to 1080p resolution |
| Mic | Differential input | USB OTG | 1x USB Type-C port |
| DC Input | 12V DC socket (9V-15V wide voltage) | HDMI | HDMI 2.0, up to 4K output |
| Power Amplifier | 8 ohms, 6W dual audio power amplifier output | EDP | Dual-EDP interface, up to 1080P resolution |
| Line Out | Left/ Right channel output | Android | 7.1 (recommended), 8.1 (optional) |
| Backlight | Backlight control interface that turns the backlight on/ off and adjusts the brightness level | Dimensions | 135mmx 95mm |
| Delivery Time | 5-8 work days | Serial Port | 1xTTL/RS-232,1xTTL/RS-232/RS-485, 4x TTL/RS-232 expansion ports |
| Linux | Ubuntu18.04, Debian 9, Buildroot+ QT 2018.02 | Payment Terms | T/T |
| Supply Ability | 200+/day | Packaging Details | |
| Headphone | 3.5mm jack (supports HPD) | Humidity | 0%-95% (non-condensing) |
| GPIO | 8x GPIO ports | IR | IR pin header |
| Brand Name | Model Number | K4 Mainboard | |
| Place of Origin | China |
K4 Smart IoT Motherboard
The K4 Smart IoT Motherboard delivers flagship performance for advanced vending machines and smart retail applications, powered by the Rockchip RK3399 hexa-core processor (dual Cortex-A72 @ 1.8GHz + quad Cortex-A53 @ 1.4GHz). This big.LITTLE architecture provides exceptional computing power for AI-driven applications, real-time video analytics, and complex multitasking. The integrated Mali-T860 GPU supports OpenGL ES 3.1 and provides 4K hardware decoding alongside 1080P hardware encoding. What sets the K4 apart is its USB Type-C port, USB 3.0, Gigabit Ethernet, Wi-Fi 5 (802.11 ac) , and LPDDR4 memory — delivering significantly faster data transfer and modern connectivity not found on other K-series boards. Additional features include 6× configurable serial ports (1 TTL, 1 TTL/485, 4 TTL/RS-232), 8× GPIO, HDMI input, multiple display interfaces (LVDS, MIPI-DSI, HDMI 2.0a 4K, eDP), and multi-OS support (Android 7.1/8.1/9.0 and Linux). The K4 is the ultimate platform for premium vending machines requiring AI capabilities, high-speed data handling, and future-proof connectivity.
Hexa-Core big.LITTLE Architecture: The RK3399's dual Cortex-A72 cores handle intensive AI inference and video analytics while quad Cortex-A53 cores manage background tasks — delivering desktop-class performance with excellent power efficiency for demanding vending applications.
USB Type-C + USB 3.0 + Gigabit Ethernet: USB Type-C for modern peripheral connectivity, USB 3.0 for 10× faster data transfer than USB 2.0, and Gigabit Ethernet for high-speed networking — the complete high-speed connectivity suite for data-intensive vending applications.
Wi-Fi 5 (802.11 ac) for Faster Wireless: Built-in 802.11 ac delivers significantly faster wireless speeds than 802.11 b/g/n — enabling quick software updates, real-time inventory syncing, and smooth video streaming for promotional content.
LPDDR4 Memory Architecture: LPDDR4 delivers higher bandwidth and lower power consumption than DDR3 — faster data processing and better energy efficiency for always-on vending machines.
1080P Hardware Encoding + 4K Decoding: 4K decoding for stunning promotional displays, combined with 1080P hardware encoding for efficient video capture — security monitoring and remote diagnostics without CPU overhead.
Multi-OS Flexibility: Supports Android 7.1/8.1/9.0 and Linux (Buildroot/Debian 9/Ubuntu 18.04) — choose the platform that best fits your application and long-term strategy.
The Connectivity King — Type-C, USB 3.0, GbE, Wi-Fi 5: The K4 is the only K-series board with USB Type-C, USB 3.0, Gigabit Ethernet, and Wi-Fi 5 — delivering modern connectivity that future-proofs your vending machines. Faster data transfers, quicker updates, and seamless integration with modern peripherals.
AI-Ready Processing for Smart Vending: The RK3399's Cortex-A72 cores provide the compute headroom needed for on-device AI — run inventory recognition, customer behavior analysis, and predictive maintenance directly on the board. No cloud latency, no external NPU required.
LPDDR4 — Faster and More Efficient: LPDDR4 memory delivers higher bandwidth and lower power consumption than the DDR3 used in other K-series boards — faster response times for customer interactions and better energy efficiency for 24/7 operation.
Future-Proof Connectivity: USB Type-C is becoming the universal standard for peripherals and diagnostics. USB 3.0 delivers 10× faster data transfers for large video files and software updates. Gigabit Ethernet ensures fast cloud communication. The K4 is ready for tomorrow's connectivity demands.
Premium Performance for Premium Vending: For vending machines with high-resolution displays, AI-powered features, and real-time video analytics — the K4 delivers the processing power and modern connectivity that entry-level boards simply can't match. Build the smartest vending machines on the market.
| Item | Details |
|---|---|
| Packaging | Anti-static bag + foam padding + industrial carton |
| MOQ | 1 piece (sample order), 100+ for volume pricing |
| Lead Time | 3–5 working days for samples; 15–20 working days for bulk orders |
| Shipping | DHL, FedEx, UPS, or by sea (customer's choice) |
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Company Details
Business Type:
Manufacturer
Year Established:
2016
Total Annual:
1000000-1500000
Employee Number:
>100
Ecer Certification:
Site Member
Shenzhen Jupin Technology Co., Ltd. ("Jupin" for short) is a domestic high-tech enterprise focusing on the development, production and sales of iris recognition and face recognition technology products. Main products: iris recognition access control, iris recognition attendance machine, fa... Shenzhen Jupin Technology Co., Ltd. ("Jupin" for short) is a domestic high-tech enterprise focusing on the development, production and sales of iris recognition and face recognition technology products. Main products: iris recognition access control, iris recognition attendance machine, fa...
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