1. Product Overview
The Symcode MJ-2877-2D is a portable wireless handheld CMOS barcode scanner designed for efficient 1D and 2D barcode reading. It offers convenient Bluetooth connectivity for use with smartphones, tablets, and PCs, making it suitable for various applications including POS systems, Android, iOS, and Windows devices.

Figure 1: Symcode MJ-2877-2D Barcode Scanner
Key Features:
- Wireless Bluetooth operation for enhanced convenience.
- Compact size with internal storage capability.
- Ability to scan barcodes directly from phone screens.
- Compatible with Windows XP/7.0/8.0/WinCE, Windows Mobile, Android OS, and iPhone/iPad.
- Long-lasting 3.7V 1000mA Li-ion battery, providing up to 8 hours of continuous work.

Figure 2: Product Components and Analysis
2. Setup and Connection
2.1 Initial Charging
Before first use, ensure the scanner is fully charged. Connect the provided changer cable to the scanner and a suitable USB power source. The 3.7V 1000mA Li-ion battery typically charges in approximately 3 hours.
2.2 Bluetooth Connection
The scanner can connect wirelessly via Bluetooth 4.0 to compatible devices. A Bluetooth 4.0 receiver is included for devices without built-in Bluetooth.
- Turn on the barcode scanner. The blue light will flash, indicating it is ready for pairing.
- On your smartphone, tablet, or PC, go to the Bluetooth settings.
- Enable Bluetooth and search for available devices.
- Select the Symcode scanner from the list to pair. Once successfully paired, the blue light will become solid.

Figure 3: Bluetooth Connection to Devices
2.3 Physical Assembly
The scanner may require minor assembly, such as attaching a hand strap or a clip, as shown in the product instructions.

Figure 4: Product Assembly Instructions
2.4 Installation and Removal Video
Video 1: Demonstrates the process of attaching and detaching a clip or accessory to the scanner, including the use of a screwdriver for secure fastening.
3. Operating Instructions
The Symcode MJ-2877-2D scanner is capable of decoding a wide range of 1D and 2D barcodes.
3.1 Scanning Barcodes
To scan a barcode, aim the scanner's light source at the barcode and press the scanning switch. The scanner will emit a beep and the scanned data will be transmitted to your connected device.
- 1D Barcodes Supported: UPC/EAN (with supplementals), Code 39, Code 93 (full ASCII), Tri-optic Code 39, RSS variants, UCC/EAN 128, Code 128 (full ASCII), Codabar (NW1), Interleaved 2 of 5, etc.
- 2D Barcodes Supported: MaxiCode, DataMatrix (ECC 200), PDF 417, QR code, etc.
3.2 Scanning from Screens
The CMOS technology allows for efficient scanning of barcodes displayed on digital screens, such as smartphones or tablets.

Figure 5: Scanning Barcodes from a Phone Screen
4. Maintenance
4.1 Battery Care
- Charge the scanner regularly to maintain optimal battery life.
- Avoid completely draining the battery before recharging.
- Use only the provided changer cable for charging.
4.2 Cleaning
- Wipe the scanner's exterior with a soft, dry cloth.
- Do not use abrasive cleaners or solvents.
- Keep the scan window clean and free of dust or debris for optimal performance.
5. Troubleshooting
5.1 Connectivity Issues
- Ensure the scanner is charged and powered on.
- Verify Bluetooth is enabled on your host device and the scanner is in pairing mode (blue light flashing).
- If using the Bluetooth receiver, ensure it is properly plugged into your device's USB port.
- Try restarting both the scanner and your host device.
5.2 Scanning Problems
- Ensure the barcode is clean, clear, and not damaged.
- Adjust the distance and angle between the scanner and the barcode.
- Check if the scanner's light source is active when the trigger is pressed.
- For specific barcode types, refer to the full programming manual (usually provided with the product or available from the manufacturer).
6. Specifications
- Model: MJ-2877-2D
- Weight: 156g
- Dimensions: 13.5 x 5.5 x 10.7 cm
- Voltage and Current: 5V ±0.5V DC; 300mA
- Light Source: Aiming: 528nm LED, Illumination: 630nm LED
- Field of Depth: 50~300mm
- Roll/Pitch/Yaw: 360°, ±65°, ±60°
- Decode Capabilities: 1D (UPC/EAN, Code 39, Code 93, Code 128, Codabar, Interleaved 2 of 5, etc.), 2D (MaxiCode, DataMatrix, PDF 417, QR code, etc.)
- Print Contrast: 25% minimum reflectance difference
- Image (Pixels): 0.35 Megapixels (752 pixels H x 480 pixels V)
- Operating Temperature: 0℃~50℃
- Storage Temperature: -40℃~70℃
- Humidity: 5%~95% non-condensing
- Battery: 3.7V 1000mA Li-ion (included)
- Connectivity: Bluetooth, USB (via changer cable/receiver)
- Compatible Devices: Desktop, Laptop, Smartphone, Tablet

Figure 6: Product Dimensions
7. Warranty and Support
Symcode aims to provide quality products and customer satisfaction. For any support needs or inquiries, please contact the manufacturer directly.
- WhatsApp Support: 86 13410733354
- Email Support: karl@mjcode.com
The manufacturer states a policy of 100% satisfaction guaranteed, regardless of purchase date.