1. Introduction
Thank you for choosing the Andoer GN40 On-camera Flash Speedlite. This manual provides detailed instructions for the proper setup, operation, and maintenance of your new flash unit. Designed for versatility and performance, this speedlite offers a high guide number, multiple flash modes, and an adjustable LED fill light to enhance your photography across various DSLR camera systems.

2. Package Contents
Please check the package carefully to ensure all items are present:
- 1 x Andoer GN40 Flash Speedlite
- 1 x Bracket
- 1 x Storage Bag
- 1 x User Manual (English)
3. Product Overview
Familiarize yourself with the components of your Andoer GN40 Flash Speedlite:

- Flash Light's Head: Contains the main flash tube and can be rotated.
- Built-in Wide Panel: Pull-out panel for wider light dispersion.
- Reflection Board: Pull-out board for bouncing light.
- LED Light: Dual LED fill light with adjustable brightness.
- LCD Screen Panel: Displays current settings and mode.
- Control Panel: Buttons for MODE, SET, UP, POWER, DOWN, and PILOT.
- Battery Compartment: Holds 3 AA batteries.
- Hot Shoe: Standard hot shoe for mounting onto cameras.
- Lock Ring: Secures the flash to the camera's hot shoe.
The flash head offers significant flexibility with a vertical rotation angle of -7 to 90 degrees and a horizontal rotation angle of 0 to 270 degrees, allowing for various lighting directions.
4. Setup
4.1 Battery Installation
- Open the battery compartment cover located on the side of the flash unit.
- Insert 3 AA batteries (not included) according to the polarity indicators (+/-) inside the compartment.
- Close the battery compartment cover securely.
4.2 Mounting the Flash to Your Camera
- Ensure your camera is turned off.
- Slide the flash's hot shoe into your camera's hot shoe mount.
- Tighten the lock ring on the flash unit to secure it firmly to the camera.
- Turn on your camera, then turn on the flash unit by pressing the POWER button.
5. Operating Instructions
5.1 Power On/Off
- Press the POWER button to turn the flash on or off.
5.2 Flash Modes
The Andoer GN40 supports four distinct flash modes:

- M Mode (Manual):
- Press the MODE button until 'M' is displayed on the LCD.
- Use the UP and DOWN buttons to adjust the flash output level from 1/128 to 1/1. Each level has 4 fine-tuning stalls for precise control.
- Multi Mode (Stroboscopic Flash):
- Press the MODE button until 'Multi' is displayed.
- This mode emits a series of rapid flashes, ideal for capturing multiple movements in a single frame. Adjust frequency and number of flashes using SET, UP, and DOWN buttons.
- LED Mode (Fill Light):
- Press the MODE button until 'LED' is displayed.
- The dual LED lights will turn on. Use the UP and DOWN buttons to adjust the brightness through 8 levels.

Close-up view of the dual LED light on the flash unit, emphasizing its adjustable brightness feature. - Static Mode:
- Press the MODE button until 'Static' is displayed.
- This mode provides a continuous light source, useful for video or constant lighting scenarios.
5.3 Test Flash (PILOT Button)
- Press the PILOT button to fire a test flash and check the light output.
5.4 Head Rotation
- The flash head can be rotated vertically from -7 to 90 degrees and horizontally from 0 to 270 degrees. Gently adjust the head to bounce light off ceilings or walls for softer illumination.
5.5 Automatic Setting Saving
- The flash unit features an automatic setting saving function. It will remember your last used settings (mode, output, etc.) for simpler use upon next power-on.
5.6 High-Speed Continuous Shooting

The Andoer GN40 is capable of high-speed continuous shooting, allowing you to capture fast-moving subjects with consistent illumination. This feature is particularly effective in Multi Mode.
6. Specifications

| Feature | Specification |
|---|---|
| Color | Black |
| Material | Plastic |
| Flash Mode | M, Multi, LED, Static |
| Guide Number | GN40 @ISO 100 |
| Vertical Rotation Angle | -7° ~ 90° |
| Horizontal Rotation Angle | 0° ~ 270° |
| Power Supply | 3 * AA batteries (not included) |
| Lighting Times | 100 ~ 500 times |
| Charging Recycle Time | 1.5s |
| Color Temperature | 5600K |
| Flash Time | 1/200s ~ 1/20000s |
| Product Size | 17.4 * 6.8 * 4cm (6.8 * 2.6 * 1.5inch) |
| Product Weight | 246g (8.4oz) |
| Package Size | 20 * 8.6 * 7cm (7.8 * 3.3 * 2.7inch) |
| Package Weight | 323g (11.3oz) |
7. Compatibility
The Andoer GN40 Flash Speedlite is designed with a standard hot shoe for broad compatibility with various DSLR cameras. However, compatibility depends on the camera's hot shoe design and electrical contacts.

- Compatible with: Cameras featuring a standard hot shoe with electrical contacts, including most models from Canon, Nikon, Olympus, Pentax, Fujifilm, and Sony (with Mi Hot Shoe).
- NOT Compatible with: Certain Canon models due to specific hot shoe designs, such as Canon EOS Rebel SL3/250D, Rebel T7/1500D, 2000D, Rebel T100/3000D, 4000D. Please verify your camera's hot shoe has electrical contacts for proper function.
8. User Tips
- Check Camera Hot Shoe: Before purchase or use, always confirm your camera's hot shoe has the necessary electrical contacts for external flash units. Some newer or entry-level cameras may have proprietary or simplified hot shoes that are not compatible.
- Battery Life: Always carry spare AA batteries, especially during extended shooting sessions, as flash units can consume power quickly.
- Bounce Flash: Utilize the rotating head and built-in reflection board to bounce light off ceilings or walls. This creates a softer, more natural-looking illumination compared to direct flash.
- LED Fill Light: The adjustable LED light is excellent for continuous lighting in video recording or as a constant fill light for still photography in low-light conditions.
9. Troubleshooting
- Flash Not Firing:
- Ensure batteries are correctly inserted and have sufficient charge.
- Check that the flash is securely mounted to the camera's hot shoe and the lock ring is tightened.
- Verify camera compatibility (see Section 7).
- Make sure the flash is powered on.
- Slow Recycle Time:
- Replace old or low-power batteries with fresh, high-quality AA batteries.
- Allow the flash to cool down if it has been used continuously at high power.
- Inconsistent Light Output:
- Check flash output settings in M mode.
- Ensure no obstructions are blocking the flash head.
- Overheating Protection:
- The flash has built-in overheating protection. If it stops firing, allow it to cool down for several minutes before resuming use.
10. Maintenance
- Cleaning: Use a soft, dry cloth to clean the flash unit. For stubborn dirt, a slightly damp cloth can be used, followed by immediate drying. Do not use strong detergents or solvents.
- Storage: When not in use for extended periods, remove the batteries to prevent leakage and store the flash in its storage bag in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Avoid dropping or subjecting the flash to strong impacts, as this can damage internal components.
11. Warranty & Support
Andoer products are manufactured to high-quality standards. For any issues or technical support, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase for warranty claims.

