GKU D300
GKU D300 3-Channel Dash Cam User Manual
Comprehensive guide for your GKU D300 4K Dash Camera.
1. Introduction
Thank you for choosing the GKU D300 3-Channel Dash Cam. This advanced dash camera system is designed to provide comprehensive surveillance for your vehicle, recording simultaneously from the front, interior, and rear. With features like 4K Ultra HD resolution, IR night vision, built-in WiFi, GPS, G-sensor, and 24-hour parking monitoring, the D300 ensures reliable evidence capture and enhanced driving safety. Please read this manual thoroughly before operation to ensure proper installation and usage.
2. What's in the Box
Verify that all items listed below are included in your package:
- D300 4K 3-Channel Dash Cam (Front and Rear)
- Free 32 GB SD Card
- Car Charger
- User Manual
- Installation Kit (Hardwire Kit NOT Included)

3. Product Features
- 3-Channel Recording: Simultaneously monitors the front (170°), interior (140°), and rear (140°) of your vehicle. Records in 2.5K+1080P+1080P HD quality for comprehensive coverage.

Figure 3.1: 3-Channel Coverage. - 4K Ultra HD Resolution: Single front camera recording up to 4K resolution. Dual recording (front and rear/inside) also supports 4K simultaneously. Features a 3.16'' IPS large screen for clear viewing.

Figure 3.2: 4K Ultra HD Resolution. - Enhanced Night Vision: Equipped with an outstanding optical lens, advanced Sony night vision sensor, F1.8 aperture, 4 IR LED lights, and a 6-glass lens for clear recording in low light conditions.

Figure 3.3: Enhanced Night Vision in action. - Built-in WiFi & Smart App: Connects to your smartphone via the "JarvisCam" app (IOS/Android) for viewing, playback, and managing recordings.

Figure 3.4: WiFi & App Control Interface. - Loop Recording & G-Sensor: Automatically overwrites oldest footage when the SD card is full. G-sensor detects collisions and locks relevant video footage to prevent overwriting.

Figure 3.5: Loop Recording and G-Sensor Functionality. - 24-Hour Parking Monitor: Records continuously in parking mode with a time-lapse function. Requires an additional Type-C hardwire kit (not included).
- Built-in GPS: Accurately records speed and coordinates, displaying travel data when played on a computer. Provides valuable evidence for accidents.
4. Setup Guide
4.1 Initial Preparation
- Charge the Dash Cam: Before first use, charge the dash camera for at least 1 hour using the provided car charger to prevent compatibility or power issues.
- Insert Micro SD Card: Insert a reputable Class 10 or higher speed 32-512GB Micro SD card into the dash cam. A 32GB Micro SD card is included in the package.
- Format SD Card: It is crucial to format the Micro SD card regularly to prevent locked videos from taking up too much capacity and affecting normal operation. This can be done via the "JarvisCam" app or directly on the device.
4.2 Installation
- Mount the Front Dash Cam: Use the provided suction mount to securely attach the main dash cam unit to your windshield, ensuring it does not obstruct your view.
- Install Rear Camera: Mount the rear camera on your rear window. Route the rear camera cable neatly along the vehicle's interior.
- Connect Power: Connect the car charger to the dash cam and plug it into your vehicle's cigarette lighter socket. For 24-hour parking monitoring, an optional Type-C hardwire kit (not included) is required for continuous power.

5. Operating Instructions
5.1 Power On/Off
The dash cam will automatically power on and begin recording when your vehicle's engine starts and power is supplied. It will power off automatically when the engine is turned off.
5.2 Basic Recording
- Continuous Recording: The dash cam records continuously in short segments (e.g., 1, 3, or 5 minutes) and saves them to the SD card.
- Loop Recording: When the SD card is full, the oldest unlocked footage will be automatically overwritten to ensure continuous recording.
5.3 G-Sensor (Emergency Recording)
The built-in G-sensor detects sudden shakes or collisions. In such an event, the dash cam will automatically lock the current video footage, saving it to a separate "emergency file" folder to prevent it from being overwritten by loop recording.
5.4 Parking Monitoring
To enable 24-hour parking monitoring, a Type-C hardwire kit (not included) is required. Once installed, the dash cam can record continuously with a time-lapse function while the vehicle is parked, providing surveillance against bumps or vandalism.
5.5 GPS Tracking
The integrated GPS module records your driving route, real-time speed, and location. This data can be viewed on Google Maps through the "JarvisCam" app or via our Windows and Mac GPSPlayer software, providing valuable additional evidence.
5.6 WiFi and App Control (JarvisCam App)
The "JarvisCam" app allows you to connect your smartphone to the dash cam via WiFi for convenient control and access to recordings.
- Download App: Download and install the "JarvisCam" app from the Google Play Store or Apple App Store.
- Connect to WiFi:
- Open the "JarvisCam" app.
- Go to your mobile phone's WiFi settings.
- Turn off cellular data and Bluetooth.
- Connect to the dash cam's WiFi network (e.g., GKU_D300_XXXXX).
- Enter the default password: 12345678.
- Return to the app and add a new camera.
- App Functions: Through the app, you can:
- View real-time video preview.
- Access and browse recorded video files.
- Download videos and screenshots directly to your phone.
- Adjust camera settings.
- Share footage with family and friends.


5.7 Official Product Video
Watch the official GKU D300 promotion video for a visual guide on features and functionality.
6. Maintenance
- SD Card Formatting: To ensure optimal performance and prevent data corruption, format the Micro SD card regularly (e.g., once a month). This clears old, unlocked footage and maintains sufficient recording space.
- Cleaning: Gently wipe the camera lenses and screen with a soft, lint-free cloth. Avoid using abrasive cleaners or solvents.
- Firmware Updates: Check the GKU official website or app for available firmware updates to ensure your dash cam has the latest features and bug fixes.
7. Troubleshooting
If you encounter issues with your GKU D300 dash cam, please refer to the following common problems and solutions:
- Q1: How to turn on the WiFi dash cam's 24-hour parking monitoring function?
- A1: The parking monitor function requires connection with a wired kit (not included in the package). If you need a wired kit for the 24-hour parking monitor function, please contact GKU customer support. The dash cam does not support pre-charging to store energy; it only receives power when the car is started and shuts down immediately when the car is turned off. The included car charger is easier to install, but for 24-hour monitoring, a hardwire kit is necessary.
- Q2: Dash cam APP (JarvisCam APP) can't connect to WiFi? Can't see live on the APP?
- A2: If you are unable to connect to the dash cam's WiFi or watch the live broadcast, please turn off VPN, Bluetooth, cellular data, security software, and antivirus apps on your mobile phone. Also, whitelist the app for photo albums, location, Wi-Fi, and cellular data permissions.
- Q3: If the dash cam for cars light stays on after the car is turned off, will it drain the car battery?
- A3: The dash cam may remain on briefly after the car is turned off to save the last folder before shutdown, or it could be related to the car's fuel system. Observe the car battery charge within 12 hours after turning off the car to prevent battery discharge. If there is a risk of discharging the car battery, a corresponding wire kit can be provided by GKU to solve this problem.
8. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 1.97 x 3.94 x 3.15 inches |
| Item Weight | 10.6 ounces |
| Model Number | D300 |
| Batteries | 1 Lithium Metal battery (included) |
| Connectivity Technologies | Wi-Fi |
| Color | Black |
| Manufacturer | GKU |
| Orientation | Front, Rear, and Inside |
| Video Capture Resolution | 4K |
| Mounting Type | Suction Mount |
9. Warranty and Support
The GKU D300 dash cam is backed by a full 1-YEAR WARRANTY and 100% Satisfaction Guarantee.
For any usage questions, accessory needs, or technical support, please reach out to GKU customer service directly. Our 7*24 hours technical support team is dedicated to providing you with the assistance you need.
You can find more information and contact details on the official GKU website or through the "JarvisCam" app.
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