--- product_id: 453081399 title: "Car Fault DiagnosisTool for OBDII Protocol Communication Detection OBD2 Breakout Box ECU Connector OBD line Signal Test (Large), KW308" brand: "luumeiy" price: "HK$2259" currency: HKD in_stock: true reviews_count: 4 category: "Luumeiy" url: https://www.desertcart.hk/products/453081399-car-fault-diagnosistool-for-obdii-protocol-communication-detection-obd2-breakout store_origin: HK region: Hong Kong --- # 8-30V battery voltage monitor 16 flexible OBD sockets Reverse connection alarm Car Fault DiagnosisTool for OBDII Protocol Communication Detection OBD2 Breakout Box ECU Connector OBD line Signal Test (Large), KW308 **Brand:** luumeiy **Price:** HK$2259 **Availability:** ✅ In Stock ## Summary > 🚗 Diagnose smarter, not harder — the KW308 is your ultimate OBD2 sidekick! ## Quick Answers - **What is this?** Car Fault DiagnosisTool for OBDII Protocol Communication Detection OBD2 Breakout Box ECU Connector OBD line Signal Test (Large), KW308 by luumeiy - **How much does it cost?** HK$2259 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/453081399-car-fault-diagnosistool-for-obdii-protocol-communication-detection-obd2-breakout) ## Best For - luumeiy enthusiasts ## Why This Product - Trusted luumeiy brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety-First Design:** Built-in reverse polarity alarm protects your expensive diagnostic tools from power shorts and wiring errors—diagnose with confidence. - • **Multi-Instrument Testing Hub:** 16 breakout banana sockets allow simultaneous connection to multimeters, oscilloscopes, and scanners—boost your diagnostic precision. - • **Universal OBD2 Compatibility:** Seamlessly connects with all major OBD2 protocols including CAN, PWM, VPW, and diesel signals for ultimate diagnostic versatility. - • **Integrated Voltage Monitoring:** Real-time 3-digit LED voltmeter displays battery voltage from 8 to 30V, keeping you informed on power status during every test. - • **Built-In Flashlight for Dark Workspaces:** Illuminate your OBD2 port with the handy flashlight feature—never miss a connection, even in low-light conditions. ## Overview The KW308 Car Fault Diagnosis Tool is a professional-grade OBD2 breakout box designed for extensive vehicle compatibility and multi-instrument testing. Featuring 16 flexible 4mm banana sockets, it supports all major OBD protocols including CAN, PWM, VPW, and diesel signals. Its built-in 3-digit LED voltmeter monitors battery voltage from 8-30V, while a reverse connection alarm safeguards your diagnostic equipment. Additional features like an integrated flashlight make it indispensable for precise, safe, and efficient vehicle diagnostics. ## Description 6 Fuctions: 1.OBD2 Male to female extension cable The cable can Connect between Diagnostic Link Connector (DLC) and scan tool 2. All OBD signal breakout with 4mm Banana socket 16 4mm banana sockets breakout all OBD signal for to Connect a multimeter or oscilloscope for detailed signal analysis 3. OBD Signal Detects: The LED can Detect PWM (J1850)/VPW (J1850) ISO 9141-2/DIS/ISO 14230-4 (12V car and 24V diesel)/CAN bus (J-2284) (SAEJ1939) Power signal and ground signal 4. Battery voltage monitor: 3-digit blue LED Voltmeter can display of voltage, Measuring range from 8-30V.So the BOX not only can detect car signal ,also can detect some of diesel signal for example the diesel of K-line L-line and CAN bus (SAEJ1939) 5.with flashlight function of OBD Connector: The OBD Male Connector with flashlight function and the button,When operating in the dark the flashlight will be very useful 6.Prevent reverse connection When the ECU wiring is reversed, the test box will emit an alarm sound RedLED 16-Battery Power On when plugged into DLC 4-Chassis Ground On when Power reverse connection 5-Signal Ground On when Power reverse connection GreenLED 4-Chassis Ground On when plugged into DLC /5-Signal Ground On when plugged into DLC 7-KLine(ISO9141-2andISO14230-4)/15-LLine(ISO9141-2andISO14230-4) YellowLED 2-Bus+ Line of SAEJ1850(PWM/VPW)/10-Bus- Line of SAEJ1850(PWM) 6-CAN High of SAEJ2284(ISO15765-4)/14-CAN Low of SAEJ2284(ISO15765-4) BlueLED 1-OEM Discretionary/3-OEM Discretionary/8-OEM Discretionary/9-OEM Discretionary 11-OEM Discretionary/12-OEM Discretionary/13-OEM Discretionary Review: An important tool to have - It's a nice tool to work with different cars. It helped me to connect the scanner, multimeter and oscilloscope, nice tool. Review: Nice tool!! - Nice tool!! ## Features - 1. Extensive compatibility: KW308 has strong compatibility and is suitable for connecting various devices. It can be directly inserted into the OBD2 socket of the car. It can also be used to test OBD terminals of different specifications. - 2. Safety: The product is designed to prevent the reverse connection of the power supply. When the reverse connection occurs, the kw308 will emit an alarm sound. Can protect the diagnostic instrument from damage such as power short circuit,very useful function - 3. Flexible conversion: 16 sockets can be wired flexibly, not affected by different sockets and terminals, and can be connected to multiple instruments for testing at the same time - 4. Support multiple types: can detect PWM (J1850) VPW (J1850) ISO 9141-2, DIS/ISO 14230-4 (12V car and 24V diesel) CAN bus (J-2284) (SAEJ1939) power signal and ground signal - 5. High-quality service: one-year quality assurance, technical guidance at any time, if you have any dissatisfaction or good ideas in use, please contact us in time ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09XB3TC4Z | | Brand | luumeiy | | Brand Name | luumeiy | | Country of Origin | USA | | Customer Reviews | 4.4 out of 5 stars 17 Reviews | | Display Size | 2.8 Inches | | Manufacturer | kawish | | Manufacturer Part Number | KW308 | | Model | KW308 | | Power Source | Battery Powered | | Power Source Type | Battery Powered | | Screen Size | 2.8 Inches | | UPC | 747749192268 | ## Product Details - **Brand:** luumeiy - **Operating System:** Windows XP - **Power Source:** Battery Powered - **Screen Size:** 2.8 Inches - **UPC:** 747749192268 ## Images ![Car Fault DiagnosisTool for OBDII Protocol Communication Detection OBD2 Breakout Box ECU Connector OBD line Signal Test (Large), KW308 - Image 1](https://m.media-amazon.com/images/I/61CqsCALV1L.jpg) ![Car Fault DiagnosisTool for OBDII Protocol Communication Detection OBD2 Breakout Box ECU Connector OBD line Signal Test (Large), KW308 - Image 2](https://m.media-amazon.com/images/I/61WsNxxhN2L.jpg) ![Car Fault DiagnosisTool for OBDII Protocol Communication Detection OBD2 Breakout Box ECU Connector OBD line Signal Test (Large), KW308 - Image 3](https://m.media-amazon.com/images/I/617jMp6nM3L.jpg) ![Car Fault DiagnosisTool for OBDII Protocol Communication Detection OBD2 Breakout Box ECU Connector OBD line Signal Test (Large), KW308 - Image 4](https://m.media-amazon.com/images/I/71qHJ9rSjeL.jpg) ![Car Fault DiagnosisTool for OBDII Protocol Communication Detection OBD2 Breakout Box ECU Connector OBD line Signal Test (Large), KW308 - Image 5](https://m.media-amazon.com/images/I/71MKzF0dBpL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ An important tool to have *by V***Z on 27 October 2025* It's a nice tool to work with different cars. It helped me to connect the scanner, multimeter and oscilloscope, nice tool. ### ⭐⭐⭐⭐⭐ Nice tool!! *by J***O on 13 June 2024* Nice tool!! ### ⭐⭐⭐⭐ 80% of the time it does wake up and works well then *by O***O on 6 April 2026* sometimes doesn't work but 80% of the time it does wake up and work and is very helpful when ti does ## Frequently Bought Together - luumeiy OBD2 Breakout Box Powerful OBDII Protocol Detector, 16 Pin Automotive CAN Breakout Box with 4mm Banana Jump Wire OBD2 Test Tool for Communication/Power/Ground Detector - Hantek 1008C PC USB 8CH Automotive Diagnostic Digital Oscilloscope/DAQ/Programmable Generator --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/453081399-car-fault-diagnosistool-for-obdii-protocol-communication-detection-obd2-breakout](https://www.desertcart.hk/products/453081399-car-fault-diagnosistool-for-obdii-protocol-communication-detection-obd2-breakout) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-07-18*