1. Introduction and Overview
This manual provides detailed instructions for the TELESIN Magnetic Camera Grip and Cooling Case, designed to enhance your iPhone 17 Pro Max photography and videography experience. It features a professional grip, efficient cooling, wireless charging, and customizable controls.
Key Features:
- Professional Cooling Design: Integrated 7600mm² graphene and grill design in the phone case enhances heat dissipation by 25%, maintaining stable iPhone 17 Pro Max performance during extended use.
- Ergonomic Grip: Inspired by classic cameras, the grip provides a comfortable and secure hold for all hand sizes, improving stability for shooting.
- Large Capacity Battery & Wireless Charging: The grip includes a built-in 3200mAh battery for extended iPhone power via wireless charging. It also supports wired power output to other devices.
- Reef Color APP & Customizable Fn Button: The dedicated 'Reef Color' app redefines camera functions, offering 8 master filters and detailed manual settings. The dial can be assigned functions like EV, shutter speed, or ISO. Firmware updates are available via OTA.
- Two-Stage Shutter & Zoom Dial: Features a two-stage mechanical shutter button (half-press for focus, full-press for capture/record) and a smooth zoom dial for up to 8x optical zoom on iPhone 17 series telephoto lenses, reducing screen tap shake.
- MagSafe Compatibility & Accessory Support: Dual-sided MagSafe compatibility allows easy attachment of accessories like the TELESIN C03 magnetic fill light. A 1/4" screw hole supports tripods and microphones. The case's aluminum CNC slide rail and magnetic system allow for easy attachment of physical filters (UV/CPL/ND filters sold separately).
- Aluminum Thumb Rest & Accidental Touch Prevention: An aluminum alloy thumb rest with anti-slip texture provides a natural resting position for the thumb, preventing accidental screen touches and ensuring a firm grip.
2. Package Contents
Please verify that all items listed below are included in your package:
- TELESIN Master Grip x 1
- iPhone 17 Pro Max Phone Case x 1
- Wrist Strap x 1
- Charging Cable (USB-C) x 1
- Instruction Manual x 1

Note: Smartphone light and UV filters are not included in this set. For smartphone light, please refer to ASIN: B0DHGHKB19. For UV filters, please refer to ASIN: B0FVKYMRLY.
3. Setup
3.1 App Installation and Permissions
- Search for and download the 'Reef Color' app from your device's app store.
- Grant all necessary permissions (wireless data, photo library, camera, microphone) when prompted by the app.
- Review the beginner's guide within the app for an initial walkthrough.
3.2 Device Connection
- Insert your iPhone 17 Pro Max into the provided cooling case.
- Power on the Master Grip by pressing and holding the power button until the indicator light flashes green.
- Open the 'Reef Color' app. Tap the '+' icon in the top-left corner to add a new device.
- Select 'Add New Device' and follow the on-screen prompts to pair the Master Grip via Bluetooth. The indicator light will turn solid green upon successful connection.

4. Operating Instructions
4.1 Basic Camera Control
Once connected, the Master Grip allows for intuitive control over your iPhone's camera functions:
- Shutter Button: Half-press to focus, full-press to capture a photo or start/stop video recording.
- Zoom Dial: Rotate the dial for smooth optical zoom control.
- Exposure Adjustment: Use the dial to adjust exposure compensation (EV).
4.2 Customizable Buttons (Reef Color App)
The 'Reef Color' app allows you to customize the functions of the dial and Fn button:
- Tap the device icon in the top-left corner of the app to enter the device settings page.
- Select 'Dial' or 'Fn Key' to choose from various functions such as Exposure Adjust, Filter Switch, Filter Intensity, Switch Shooting Mode, Adjust ISO, or Adjust Shutter Speed.
- The 'Wake-Up Key' can be configured to switch focal length, switch camera (front/rear), or switch shooting mode (video/photo/LivePhoto).

4.3 Advanced App Features
The Reef Color app provides advanced features for professional-grade photography:
- Master Filters: Choose from 8 master filters (e.g., FNC, Hass X, Leica M, Polaroid, CCD, FSA, EOS, Faded) to apply unique color tones and styles to your photos and videos.
- Manual Settings: Access detailed manual controls for precise adjustments.
- OTA Firmware Updates: Keep your Master Grip updated with the latest features and performance improvements through over-the-air firmware updates via the app.

5. Maintenance
To ensure the longevity and optimal performance of your TELESIN Magnetic Camera Grip and Cooling Case, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the grip and case. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: For optimal battery life, avoid fully discharging the grip's battery frequently. Charge it regularly, even if not in use for extended periods.
- Handle with Care: While durable, avoid dropping the device or subjecting it to strong impacts.
6. Troubleshooting
If you encounter any issues with your TELESIN Magnetic Camera Grip and Cooling Case, please refer to the following common solutions:
- Device Not Connecting:
- Ensure the Master Grip is powered on and the indicator light is flashing green.
- Check your iPhone's Bluetooth settings to ensure it's enabled and the grip is not already paired with another device.
- Restart both your iPhone and the Master Grip, then attempt to pair again.
- Ensure the 'Reef Color' app has all necessary permissions granted.
- Buttons Not Responding:
- Verify that the Master Grip is successfully connected to the 'Reef Color' app.
- Check the app's device settings to ensure the buttons are assigned to desired functions.
- Ensure the app is the active camera application.
- Charging Issues:
- Use the provided USB-C charging cable.
- Ensure the charging cable is securely connected to both the grip and a power source.
- If wireless charging to the iPhone is not working, ensure the iPhone is correctly aligned with the MagSafe area on the grip.
- Overheating (iPhone):
- The cooling case is designed to mitigate overheating. If your iPhone still overheats, ensure the case is properly installed and the cooling vents are not obstructed.
- Reduce background app usage on your iPhone during intensive tasks.
If these steps do not resolve the issue, please contact customer support for further assistance.
7. Specifications
| Brand Name | TELESIN |
| Manufacturer Model Number | TX-JP-P5-MCS-11-TIP |
| Compatible Devices | iPhone 17 Pro Max |
| Included Components | TELESIN Master Grip x1, Phone Case x1, Wrist Strap x1, Charging Cable x1, Instruction Manual x1 |
| Video Capture Format | MP4, MOV |
| Video Resolution | 4K (3840 x 2160) |
| Shooting Functions | Photo, Video, Time-lapse, Slow Motion, Portrait, Night Mode, etc. |
| Exposure Control Type | Av, Tv, M |
| Waterproof | No |
| Viewfinder Type | LCD Screen |
| Country of Origin | China |
8. Warranty and Support
Your TELESIN Magnetic Camera Grip and Cooling Case comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use.
For warranty claims, technical support, or any inquiries, please contact TELESIN customer service through the retailer where you purchased the product or visit the official TELESIN website for support contact information.
Please retain your proof of purchase for warranty validation.





