Introduction
This manual provides comprehensive instructions for the proper use and maintenance of your JJC MC-SD12 Water Resistant Memory Card Case. Designed for durability and protection, this case ensures the safety of your valuable SD and MicroSD memory cards.
Product Features
- Robust Construction: Made from tough, water-resistant polycarbonate resin.
- Secure Sealing: Features a waterproof rubber seal to protect against moisture.
- Optimized Storage: Each slot is precisely tailored to fit memory cards securely, preventing movement.
- Dual-Sided Capacity: Designed with two sides for efficient storage of multiple cards.
- Ergonomic Locking System: Ensures the case remains securely closed.
- Portability: Includes a built-in hole for easy attachment and carrying.
- Capacity: Accommodates up to 12 SD cards.
Setup and Card Insertion
Follow these steps to properly open the case and insert your memory cards:
- Opening the Case: Locate the ergonomic locking latch on the side of the case. Gently pull the latch outwards and lift the lid to open the case.
- Inserting SD Cards: The case features precisely cut foam slots. Align your SD card with an empty slot and gently push it down until it is securely seated. The foam will hold the card firmly in place.
- Inserting MicroSD Cards: For MicroSD cards, use a standard SD adapter. Insert the MicroSD card into its adapter, then insert the adapter into an SD card slot as described above.
- Closing the Case: Ensure all cards are properly seated. Align the two halves of the case and press them together until the ergonomic locking latch clicks securely into place. Verify the waterproof rubber seal is fully engaged around the perimeter.

Figure 1: The JJC MC-SD12 case showing the snap-on locking system.

Figure 2: Interior view of the case, illustrating the 12 SD card slots and the weather-resistant silicone seal.
Operating Instructions
The JJC MC-SD12 case is designed for reliable protection of your memory cards in various environments.
- Water Resistance: The case is built with a water-resistant design. While it offers significant protection against splashes and light rain, it is not intended for prolonged submersion. Always ensure the case is securely closed before exposure to moisture.
- Secure Transport: The inner lining is made of TPR rubber for shock absorption, keeping your memory cards firmly in place even during movement.
- Carrying Options: Utilize the integrated hole to attach a lanyard, carabiner, or keychain for convenient and secure carrying.

Figure 3: The case demonstrating its water-resistant capabilities against splashes.

Figure 4: The compact case shown in a real-world scenario, emphasizing its ease of transport.
Maintenance
- Cleaning: Wipe the exterior of the case with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the polycarbonate material or rubber seal.
- Interior Care: Periodically inspect the foam inserts for any debris. Use a soft brush or compressed air to clean the slots if necessary.
- Seal Inspection: Regularly check the waterproof rubber seal for any signs of wear, cracks, or damage to ensure continued water resistance.
- Storage: Store the case in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
Troubleshooting
This memory card case is designed for simplicity and reliability. Should you encounter any issues, consider the following:
- Cards Not Fitting: Ensure you are attempting to insert the correct type of card (SD or MicroSD with adapter) into the appropriately sized slot. Do not force cards into slots.
- Case Not Closing Securely: Check that no cards are protruding from their slots and that the rubber seal is properly aligned and free of obstructions. Apply firm, even pressure until the latch clicks.
- Water Leakage: If you suspect water has entered the case, immediately open it, remove cards, and allow both the case and cards to dry completely in a well-ventilated area. Inspect the rubber seal for damage.
Specifications
| Model | MC-SD12 |
| Capacity | 12 SD cards (also compatible with MicroSD cards using adapters) |
| Material | Polycarbonate Resin, TPR Rubber |
| Dimensions (L x W x H) | 5.63 x 3.15 x 1.1 inches (14.3 x 8.0 x 2.8 cm) |
| Weight | 4.8 ounces (136 grams) |
| Color | Black with Yellow Seal |
Warranty and Support
For warranty information or technical support regarding your JJC MC-SD12 Memory Card Case, please refer to the official JJC website or contact your retailer. Keep your purchase receipt as proof of purchase for any warranty claims.





