Introduction
The SmallRig All-in-One Video Kit Ultra (Model 3591C) is a comprehensive solution designed for mobile video creators. This kit provides enhanced stability, lighting, and audio capabilities for smartphones, making it ideal for vlogging, live streaming, and professional video production. It features a universal phone cage, quick-release tripod, wireless control handles, an RGB LED light, and a microphone.
Video: Overview of the SmallRig All-in-One Video Kit Ultra, showcasing its various components and applications for video creation.
Package Contents
Please verify that all items listed below are included in your package:
- 1 x Universal Phone Cage
- 1 x Tripod
- 1 x Power Bank Holder
- 1 x Wireless Control Side Handle
- 1 x Side Handle
- 1 x RGB LED Light
- 1 x Microphone
- 1 x Shock Mount
- 1 x Windproof Sponge Foam
- 1 x Furry Windshield
- 1 x 3.5mm Camera Audio Cable
- 1 x 3.5mm Smartphone Audio Cable
- 1 x Microphone Storage Bag
- 1 x Lightning to 3.5 mm Cable
- 1 x USB-C to 3.5 mm Cable
- 2 x Allen Wrench
- 2 x Cable Tie
- 1 x User Manual

Image: All components included in the SmallRig All-in-One Video Kit Ultra, neatly arranged.
Setup Guide
Follow these steps to assemble your SmallRig All-in-One Video Kit Ultra:
- Attach the Phone Cage to the Tripod:
Remove the quick release plate from the tripod. Securely attach this plate to the bottom of the universal phone cage. Then, mount the cage onto the tripod by re-inserting the quick release plate into the tripod head. - Mount the Power Bank Holder:
Attach the power bank holder to the back of the phone cage using the provided 1/4''-20 screws and Allen wrench. Ensure it is tightened securely. - Attach the Handles:
Mount the wireless control side handle and the standard side handle to the sides of the phone cage using the 1/4''-20 screws. Use the Allen wrench to tighten them firmly. - Install the RGB LED Light:
Insert the RGB LED light into the cold shoe mount on one of the handles and tighten it clockwise until secure. - Install the Microphone:
Attach the microphone to the shock mount, then insert the shock mount into the cold shoe mount on the other handle. Connect the microphone to your smartphone using the appropriate 3.5mm audio cable and adapter (Lightning to 3.5mm or USB-C to 3.5mm) as shown in the video. - Insert Your Smartphone:
Open the phone holder on the cage and carefully place your smartphone inside. Turn the knob clockwise to lock it securely. - Connect Power Bank (Optional):
If using a power bank, place it in the power bank holder and connect it to your phone using a suitable cable to ensure continuous power during recording. - Bluetooth Pairing for Wireless Control:
Turn on the wireless control side handle. On your smartphone, go to Bluetooth settings and pair with the device named "SR WR-02". This enables remote start/stop recording.

Image: Detailed view of the quick release ball head, illustrating how to attach and detach the phone cage from the tripod.
Video: Step-by-step guide on how to install the microphone and connect it to your smartphone using the provided cables and adapters.

Image: The phone cage with a power bank securely mounted and connected to the smartphone, ensuring extended recording time.
Video: Comprehensive installation guide for the SmallRig All-in-One Video Kit, demonstrating assembly of all components.
Operating Instructions
Using the Wireless Control Handle
Once paired via Bluetooth, press the button on the wireless control side handle to remotely start or stop video recording on your smartphone. This allows for stable, shake-free recording initiation.
Adjusting the RGB LED Light
The RGB LED light features stepless color temperature adjustment (2700K-6500K) and 36,000 RGB colors with 12 FX light effects. Use the control dial on the light to cycle through modes and adjust brightness and color to suit your shooting environment.

Image: The RGB LED light displaying various color temperatures (warm, soft, cold) and its control interface.
Switching Between Handheld and Tripod Modes
The quick-release ball head allows for rapid transitions between handheld and tripod shooting. Simply press the quick-release button to detach the cage for handheld use, or re-attach it to the tripod for stable, stationary shots.

Image: Visual examples of the kit being used in dual handheld, single handheld, and tripod configurations.
Maintenance
To ensure the longevity and optimal performance of your SmallRig Video Kit, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe down the metal components. For the microphone's foam and furry windshield, gently brush off dust. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the kit in its provided storage bag or a clean, dry environment away from extreme temperatures and humidity.
- Screw Tightness: Periodically check all screws and connections to ensure they are tight. Re-tighten with the provided Allen wrenches if necessary to prevent components from loosening during use.
Troubleshooting
If you encounter any issues, refer to the following common troubleshooting tips:
- Wireless Control Not Connecting: Ensure the wireless control handle is charged and powered on. Check your phone's Bluetooth settings to confirm it's paired with "SR WR-02". If issues persist, try unpairing and re-pairing the device.
- Microphone Not Recording Audio: Verify that the microphone is correctly plugged into the 3.5mm adapter, and the adapter is fully inserted into your phone's port. Check your phone's audio input settings to ensure the external microphone is selected. Some phones may display "headset" when an external microphone is connected, which is normal.
- LED Light Not Turning On: Ensure the RGB LED light is charged. Check the power button and control dial for proper operation.
- Unstable Phone Mount: Make sure the phone holder knob is fully tightened clockwise after inserting your smartphone. Ensure the quick release plate is securely locked into the tripod head.
Specifications
| Brand | SMALLRIG |
| Model Number | 3591C |
| Connectivity Technology | USB |
| Hardware Interface | USB Type C |
| Product Dimensions | 4.92"W x 2.28"H |
| Compatible Shoe Mount Type | Cold Shoe |
| Flash Modes Description | Constant illumination, adjustable brightness, adjustable color temperature |
| Water Resistance Level | Waterproof |
| Item Weight | 1129 Grams |
| Compatible Devices | Cage supports phones 57mm~90mm (2.24~3.54 inches) wide (with case); for iPhone 15/15 Plus/15 Pro/15 Pro Max/14/14 Plus/14 Pro/14 Pro Max/13/13 Pro/13 Mini/13 Pro Max/12/12 Pro/12 Mini/12 Pro Max/11/11 Pro/11 Pro Max; for Samsung Galaxy S23/S22/S21/S20 Ultra/ Note20/10, Pixel 7/6/5 series; for Huawei P60/60 Pro/60Pro Max/50/50 Pro/50 Pro Max/40/ 40 Pro/ 40 Pro Max, Mate Series; for Xiaomi, etc. |
| Audio Recording | Yes |
| Video Capture Format | MP4, MOV, AVI |
| Video Capture Resolution | 1080p or higher |
Warranty and Support
SmallRig products are designed for durability and performance. For warranty information, technical support, or service inquiries, please refer to the official SmallRig website or contact their customer service directly. Keep your purchase receipt for warranty claims.