1. Introduction
Thank you for choosing the SZshufen 4G LTE Dual Dash Cam. This device is designed to provide comprehensive vehicle surveillance and smart driving assistance. Featuring dual cameras for front and rear recording, 4G LTE connectivity for remote monitoring, ADAS safety alerts, and GPS navigation, this dash cam enhances your driving experience and vehicle security. Please read this manual thoroughly before installation and operation to ensure proper use and optimal performance.
2. Product Overview
2.1 Package Contents
The package includes the following components:
- Main Dash Cam Unit (with 3-inch touch screen and rotatable front camera)
- Rear Camera
- Hardwire Kit
- User Manual
- 64GB SD Card
- Crowbar Wiring Tool
- GPS Antenna
- SOS Alarm Button
2.2 Key Features
- Android 10.0 System: Powered by Android 10.0 with RAM2G and ROM32G for smooth performance and app support.
- 4G LTE Connectivity: Supports real-time GPS tracking, cloud backups, and remote viewing via smartphone (US SIM card required, T-Mobile/AT&T recommended, not compatible with Verizon).
- Dual Cameras: 270° rotatable 1080P front/cabin camera and a 720P rear camera for comprehensive coverage.
- ADAS Safety Alerts: Advanced Driver-Assistance Systems warn of lane departures, forward collisions, and pedestrians.
- Real-Time GPS Navigation: GPS antenna logs route and speed, with real-time navigation via Android apps.
- Two-Way Talk: Communicate remotely with your vehicle via the Car Assist app.
- 3-Inch Full HD Touch Screen: Responsive 640*360P display for easy navigation and settings adjustment.
- 24/7 Parking Mode: Motion and impact detection automatically records threats when the engine is off.
- Emergency SOS Alarm Button: Quickly alerts emergency contacts in case of accidents.
2.3 Product Dimensions
The main dash cam unit measures approximately 1.18"D x 2.44"W x 4.72"H.

Figure 2.3.1: SZshufen Dash Cam Dimensions
3. Setup & Installation
The installation of this dash cam involves hardwiring to your vehicle's fuse box. Professional installation is recommended if you are not familiar with automotive electrical systems.
3.1 Hardwire Kit Installation
The power cable is a hardwire kit designed for 24-hour parking monitoring. This requires connecting to your vehicle's fuse box. The dash cam will record at very low energy consumption, activating only upon movement or impact to prevent battery drain.
Video 3.1.1: Hardwire kit installation guide. This video demonstrates the process of connecting the dash cam's hardwire kit to a vehicle's fuse box, including identifying constant power and ACC wires using a multimeter, and securing the ground connection.
3.2 SIM Card and SD Card Insertion
Insert a compatible US SIM card (T-Mobile/AT&T recommended) into the designated slot for 4G LTE functionality. Also, insert the provided 64GB microSD card (or another compatible card up to 128GB) for video storage.
Video 3.2.1: SIM card and SD card insertion. This video shows how to properly insert the SIM card and SD card into the dash cam unit.
3.3 GPS Antenna and SOS Button Installation
Mount the GPS antenna to the windshield, ensuring a clear view of the sky for optimal signal reception. The SOS alarm button can be placed in an easily accessible location within the vehicle.

Figure 3.3.1: Product Accessories including GPS antenna and SOS alarm button.

Figure 3.3.2: SOS Alarm Button placement example.
4. Operating Instructions
4.1 Touch Screen Navigation
The 3-inch touch screen display allows for intuitive control. Tap icons to navigate menus, adjust settings, and review footage. The Android 10.0 OS supports various applications, including Google Maps for navigation.

Figure 4.1.1: Dash Cam Touch Screen Interface.

Figure 4.1.2: Touch Screen Functionality.
4.2 Car Assist App Connection
Download the Car Assist app on your smartphone to enable remote monitoring features. Connect the app to your dash cam to access live video streaming, GPS tracking, and receive alarm messages in case of incidents.
Video 4.2.1: Car Assist App connection guide. This video demonstrates how to connect the dash cam to the Car Assist mobile application for remote monitoring and control.

Figure 4.2.2: Remote Monitoring via Car Assist App.
4.3 Two-Way Talk
When connected via LTE, the Car Assist app enables two-way audio communication. You can speak to passengers in your car or to individuals near your vehicle. Ensure your smartphone's mute switch is off to hear audio.

Figure 4.3.1: Two-Way Talk Functionality.
5. Advanced Features
5.1 ADAS Safety Alerts
The Advanced Driver-Assistance Systems (ADAS) provide real-time warnings for potential hazards such as lane departures, forward collisions, and pedestrian detection, enhancing driving safety.

Figure 5.1.1: ADAS Function in action.
5.2 24/7 Parking Mode
With the hardwire kit installed, the dash cam supports 24-hour parking monitoring. It uses motion and impact detection to automatically record events, sending alarm messages to your Car Assist app if an incident occurs.

Figure 5.2.1: 24 Hours Parking Monitor.
5.3 Dual Camera Recording
The dash cam features a 270° rotatable 1080P front camera, allowing recording of the road ahead or the vehicle's interior. A separate 720P rear camera captures the view behind your vehicle.

Figure 5.3.1: Dual Camera Recording Views.

Figure 5.3.2: Front and Rear Camera Setup.
6. Specifications
| Feature | Description |
|---|---|
| Brand | SZshufen |
| Model Name | SZshufen |
| Vehicle Service Type | Car |
| Connectivity Technology | Wi-Fi, 4G LTE |
| Special Features | 4G and Hotspot, Touch Screen, Bluetooth Hands-Free, Built-In WiFi, GPS Tracking, App Remote Live View, FM Transmitter, Voice Record, Photo Capture, Reverse Parking View, Built-In Display, G-Sensor, Loop Recording, ADAS, Date/Time Mark on Video, Two-Way Talk |
| Video Capture Resolution | Front: 1080p, Rear: 720p |
| Included Components | Hardwire Kit, Rear camera, User Manual, 64GB SD card, Crowbar Wiring Tool, GPS Antenna, SOS Alarm Button |
| Mounting Type | Windshield Mount |
| Color | Black |
| Field Of View | 270 Degrees (Front Camera) |
| Control Method | Touch |
| Screen Size | 3 Inches |
| Flash Memory Type | microSD |
| Flash Memory Supported Size Maximum | 128 GB |
| Frame Rate | 30 FPS |
| Display Type | LCD |
| Item Dimensions D x W x H | 1.18"D x 2.44"W x 4.72"H |
7. Troubleshooting
If you encounter any issues with your SZshufen 4G LTE Dual Dash Cam, please refer to the following common troubleshooting steps:
- Device Not Powering On: Ensure the hardwire kit is correctly installed and connected to the vehicle's fuse box, with proper constant power, ACC, and ground connections. Verify that the vehicle's battery has sufficient charge.
- No 4G LTE Connectivity: Check if a compatible US SIM card is properly inserted and activated with a data plan. Ensure you are within a T-Mobile or AT&T network coverage area. (Note: Not compatible with Verizon).
- Car Assist App Connection Issues: Ensure your dash cam has active 4G LTE connectivity. Verify your smartphone's internet connection and that the Car Assist app is updated to the latest version.
- Poor GPS Signal: Ensure the GPS antenna is mounted on the windshield with a clear view of the sky, away from any obstructions.
- Parking Mode Not Recording: Confirm the hardwire kit is correctly installed to enable 24/7 power. Check parking mode settings within the dash cam to ensure it's activated.
- Touch Screen Unresponsive: Restart the device. If the issue persists, ensure the screen is clean and free from debris.
For further assistance, please contact seller customer service.
8. Warranty & Support
8.1 Warranty Information
The SZshufen 4G LTE Dual Dash Cam comes with a 1-Year Warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or improper installation.
8.2 Customer Support
If you require technical support, have questions about installation, or need assistance with any aspect of your dash cam, please do not hesitate to contact SZshufen seller customer service. Our team is available to provide guidance and resolve any issues you may encounter.
Contact information can typically be found on the product packaging or through your purchase platform.