Introduction
The Sofirn SC21 PRO is a compact, powerful, and versatile LED flashlight designed for everyday carry (EDC) and various outdoor activities such as hunting, camping, hiking, searching, fishing, cycling, and night-walking. Featuring a high-performance LH351D LED, USB-C recharging, a magnetic tailcap, and a multi-mode user interface, the SC21 PRO offers reliable illumination and convenience in a small package.
Figure 1: Sofirn SC21 PRO LED Flashlight
Safety Information
- Do not shine the flashlight directly into eyes. The powerful beam can cause temporary vision impairment.
- Keep out of reach of children to prevent accidental activation or misuse.
- Use only the recommended 16340 Li-Ion battery. Using incompatible batteries may damage the device or pose a safety risk.
- Ensure correct battery polarity during installation.
- Do not disassemble the flashlight head or body beyond what is necessary for maintenance.
- Avoid exposing the flashlight to extreme temperatures or direct sunlight for prolonged periods.
- If the flashlight becomes excessively hot during use, reduce the brightness level or turn it off to prevent damage.
Package Contents
Please check the package for the following items:
- Sofirn SC21 PRO LED Flashlight
- 16340 Li-Ion Battery (optional, depending on chosen set)
- USB-C Charging Cable
- Two-way Pocket Clip
- Lanyard
- Spare O-rings
- User Manual (this document)
Specifications
| Feature | Detail |
|---|---|
| Model Number | SC21 PRO |
| Light Source | High Performance NW LED LH351D |
| Emitter Color Temperature | 5000K |
| Color Rendering Index (CRI) | 90 CRI |
| Max Output | 1100 Lumens |
| Max Beam Distance | 131 meters (429 ft) |
| Length | 73mm (2.8 inches) |
| Body Diameter | 22.5 mm (0.8 inches) |
| Weight | 39g (1.38 oz) (without battery or pocket clip) |
| Body Material | Aluminum Alloy |
| Battery Options | 1 x 16340 Li-Ion battery |
| Charger | Type-C Rechargeable (5V/1A) |
| Waterproof Rating | IPX8 (up to 2 meters under water, not for diving) |
| Impact Resistance | 1 meter (3.28 ft) |
| Switch Mode | Moondlight, Low, Medium, High, Turbo, Stepless Ramping, Strobe, SOS, Beacon |
| Focal Length | Non-adjustable |
| User Interface | Anduril 1.0 UI |
| Functions | Shock Resistant, Self Defense, Hard Light |
| Certifications | CCC, CE, FCC |
Table 1: Sofirn SC21 PRO Specifications
Figure 2: SC21 PRO Performance Parameters
Setup
1. Battery Installation
- Unscrew the tail cap of the flashlight.
- Insert one 16340 Li-Ion battery with the positive (+) end facing towards the flashlight head.
- Screw the tail cap back on tightly to ensure proper contact and water resistance.
2. Initial Charging
Before first use, it is recommended to fully charge the battery.
- Locate the USB-C charging port on the flashlight body.
- Connect the provided USB-C cable to the flashlight and a 5V/1A USB power source (e.g., wall adapter, power bank, computer USB port).
- The power indicator on the side switch will show the charging status:
- **Red light:** Charging in progress.
- **Green light:** Charging complete.
- A full charge typically takes about 1.5 hours.
Figure 3: SC21 PRO Component Diagram
Figure 4: Type-C Charging in Progress
Operating Instructions
The SC21 PRO uses the Anduril 1.0 UI, offering a wide range of modes and customization. Here are the basic operations:
Basic Operation (Anduril 1.0 UI)
- **Turn On/Off:** Single click the side switch.
- **Stepless Ramping:** When ON, press and hold the switch to ramp up or down. Release and press-hold again to ramp in the opposite direction.
- **Instant Turbo:** From ON, double-click to activate Turbo mode. Double-click again to return to the previous mode.
- **Moonlight Mode:** From OFF, press and hold the switch for about 1 second.
- **Mode Memory:** The flashlight will remember the last used brightness level (except for Turbo, Strobe, SOS, and Beacon).
Special Modes (Flashing Modes)
From OFF, triple-click the switch to enter the special modes group. Single-click to cycle through:
- **Strobe:** For signaling or disorienting.
- **SOS:** For emergency signaling.
- **Beacon:** A low-power flash for location marking.
Power Indicator
The LED indicator in the side switch provides real-time battery status:
- **Green:** Battery power > 70%
- **Red:** Battery power between 30% and 69%
- **Red Flashing:** Battery power < 10% (recharge immediately)
Video 1: Sofirn SC21 PRO Product Demonstration (Magnetic tailcap and beam performance)
Charging
The SC21 PRO features a built-in USB-C charging port for convenient recharging of the 16340 Li-Ion battery.
- **Charging Input:** 5V/1A via USB-C.
- **Charging Time:** Approximately 1.5 hours for a full charge.
- **Charging Indicator:** The side switch LED will glow red during charging and turn green when fully charged.
- **Battery Life:** The rechargeable lithium 16340 battery can be recycled more than 3000 times.
Maintenance
- **Cleaning:** Clean the flashlight body with a soft, damp cloth. Do not use harsh chemicals or abrasives.
- **Threads and O-rings:** Lubricate the threads and O-rings regularly with silicone grease to maintain water resistance and smooth operation. Replace O-rings if they appear damaged.
- **Battery Care:** If the flashlight will not be used for an extended period, remove the battery to prevent potential leakage or damage. Store batteries in a cool, dry place.
- **Contact Points:** Keep the battery contact points clean to ensure reliable electrical connection.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on. | Battery is dead or incorrectly inserted. Loose tail cap. | Charge the battery. Ensure battery is inserted with correct polarity. Tighten the tail cap. |
| Light is dim or flickers. | Low battery power. Dirty contact points. | Recharge the battery. Clean battery contact points. |
| Flashlight gets hot quickly. | Operating in Turbo/High mode for extended periods. | The SC21 PRO has temperature regulation. Reduce brightness level or turn off the flashlight to allow it to cool down. |
| Charging indicator not working. | Faulty USB cable or power source. Battery not making contact. | Try a different USB-C cable and power source. Ensure battery is correctly inserted. |
Table 2: Common Troubleshooting Steps
User Tips
- **Enhanced Grip:** The small squared texture milling on the host provides a perfect grip and comfortable feel, especially during prolonged use.
- **Optimal Beam Quality:** The SC21 PRO features a perfectly balanced hot spot for optimal clarity and a soft transition, ensuring comfortable vision without harsh edges. The 5000K LH351D LED produces a slightly yellowish light beam that is gentle on the eyes in darkness.
- **Versatile 4-in-1 Functionality:**
- **Headlight:** Use the removable dual-way clip to attach it to a hat brim.
- **Hands-free Light:** The magnetic tailcap allows you to attach the flashlight to metal surfaces, converting it into a tent light or mini spotlight.
- **Keychain Light:** Connect it to a keychain for easy access.
- **Emergency Light:** Its compact size makes it ideal for carrying in a pocket or bag for emergencies.
- **Anduril UI:** The flashlight uses Anduril 1.0 UI, which offers advanced customization options. Refer to the full Anduril manual online for detailed programming instructions if you wish to explore advanced features beyond basic operation.
Figure 5: Magnetic Tailcap and Dual-Way Clip in Use
Figure 6: SC21 PRO Beam Quality Comparison
Figure 7: Super Bright & Wide Beam Performance
Figure 8: Compact Size and Anduril 1.0 UI
Warranty and Support
Sofirn products are manufactured to high-quality standards. For any issues or questions regarding your SC21 PRO flashlight, please contact the seller or manufacturer's customer support. Keep your purchase receipt as proof of purchase for warranty claims.
