1. Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your HTLNUZD Zorro CC2500 Hall Handle Remote Control. Designed for FPV drones, this transmitter offers advanced features and ergonomic design for an optimal control experience.
Key Features:
- External Module Bay: Compatible with Crossfire / ELRS and other modules.
- Mode Switching: Easily change between Mode 1 and Mode 2 without disassembly.
- Adjustable Hall Gimbals: Provides smooth centering and precise response.
- Versatile Charging: Built-in USB-C charging, supports external 2S battery power supply.
- Ergonomic Design: Comfortable handle with replaceable/upgradable non-slip grips.
- Advanced System: Features rear and top assignable push buttons, scroll wheels, RadioMaster's 7-button menu navigation, and various RF options.
- Foldable Antenna: For convenient storage and transport.
- Oversized LCD Display: Clear visibility in various environments.
2. What's in the Box
Upon opening your package, please ensure all the following items are present:
- 1x CC2500 Version Remote Control
- 1x Box
- 1x Brochures
- (Note: Batteries are not included with the standard CC2500 Version. Please check your specific package contents.)
3. Product Overview
Familiarize yourself with the components and controls of your Zorro CC2500 remote control.

Figure 3.1: Front view of the Zorro CC2500 Remote Control, highlighting its compact design and main controls.
3.1 Controls and Indicators
- Hall-Effect Gimbals: Two primary control sticks for precise movement. Adjustable for Mode 1 or Mode 2.
- Oversized LCD Display: Monochrome screen for system information and settings.
- Power Button: Located centrally below the display.
- Navigation Buttons: SYS, RTN, PAGE>, PAGE<, TELE buttons for menu navigation.
- Scroll Wheels: For navigating menus and adjusting values.
- Switches: Various assignable switches (e.g., SF, SE) for different functions.

Figure 3.2: Close-up of the oversized LCD display and the spring tension and self-centering/throttle adjuster screws for the Hall Gimbals. Mode 1 and Mode 2 can be changed without disassembly.
3.2 Ports and Connectors
- USB-C Port: For charging and connecting to a computer.
- Headphone Audio Output: For audio feedback.
- DSC Port: For simulator connection.
- SD Card Slot: For firmware updates and model storage.
- External Module Bay: Located at the rear, compatible with Nano size modules (e.g., TBS Nano Crossfire, Nano Tracer, IRC Ghost).

Figure 3.3: Top view showing the foldable antenna, audio output, DSC port, SD card slot, and USB port.

Figure 3.4: Dimensions of the Zorro CC2500 (170x159x108mm) and various side views, illustrating its compact and ergonomic form factor.

Figure 3.5: Ergonomically designed handle with replaceable non-slip grips and the 18350 battery compartments.

Figure 3.6: Illustration of the Zorro CC2500's support for OpenTX and EdgeTX open-source operating systems, and available RF configurations (4IN1, CC2500, SX1280 (ELRS), CC2500+TBS).
4. Setup
4.1 Battery Installation
The Zorro CC2500 uses 18350 batteries. Ensure correct polarity when inserting. The remote also supports an external 2S battery power supply.
Video 4.1: Product Overview of the Radiomaster Pocket, demonstrating battery installation and general features. Note that the Zorro CC2500 uses 18350 batteries, while this video shows a different battery type for a similar product.
4.2 Initial Power On
To power on the remote, press and hold the power button until the display illuminates and the system boots up. The remote supports OpenTX / EdgeTX operating systems.
Video 4.2: Demonstration of powering on the remote control and navigating its basic menu. This video is for a similar product, but the power-on sequence is generally consistent.
4.3 Antenna Adjustment
The antenna is foldable for transport. For optimal signal, ensure the antenna is fully extended and positioned correctly during operation.
5. Operating
5.1 Basic Controls
The Hall-effect gimbals provide precise control for your FPV drone. The left gimbal typically controls throttle and yaw, while the right gimbal controls pitch and roll (in Mode 2). These can be adjusted for Mode 1 operation.
5.2 Menu Navigation
Use the SYS, RTN, PAGE>, PAGE<, and TELE buttons along with the scroll wheels to navigate through the OpenTX / EdgeTX firmware menus. Refer to the firmware documentation for detailed menu options and configurations.
5.3 Binding to a Receiver
The CC2500 multi-protocol internal RF module supports various protocols. The binding procedure will depend on the specific receiver you are using. Consult your receiver's manual for detailed binding instructions. Ensure the remote control and receiver are set to the same protocol.
5.4 External Module Usage
The external module bay allows for compatibility with modules like TBS Crossfire or ELRS. Insert the module into the bay and configure it through the remote's firmware settings as per the module's instructions.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the remote control. Avoid using harsh chemicals or solvents.
- Storage: Store the remote in a cool, dry place away from direct sunlight and extreme temperatures. Fold the antenna for compact storage.
- Firmware Updates: Regularly check for and install firmware updates via USB or SD card to ensure optimal performance and access to new features.
- Gimbal Calibration: Periodically calibrate the gimbals through the firmware settings to maintain accuracy.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Remote does not power on. | Low or depleted battery; incorrect battery installation. | Charge the battery via USB-C or replace with fully charged batteries. Ensure batteries are inserted with correct polarity. |
| Drone does not respond to remote. | Not bound to receiver; incorrect protocol selected; out of range. | Ensure remote and receiver are properly bound and using the same protocol. Check range and line of sight. |
| Gimbal input is erratic or inaccurate. | Gimbals require calibration; physical obstruction. | Perform gimbal calibration through the remote's firmware settings. Check for any debris or damage around the gimbals. |
| Display is blank or unreadable. | Low battery; display brightness setting. | Charge the battery. Adjust display brightness in settings. |
8. Specifications
| Feature | Detail |
|---|---|
| Physical Dimensions | 170 x 159 x 108 mm (6.69 x 4.25 x 6.69 inches) |
| Weight | 650g (2 pounds) |
| Operating Frequency | 2.400GHz - 2.480GHz |
| Internal RF Options | CC2500 multi-protocol |
| Supported Protocols | Module dependent |
| RF Power | CC2500: 20dBm max. |
| Antenna Gain | Folding 2db |
| Operational Current | 160mA@8.4V |
| Operational Voltage | 6.6-8.4v DC |
| Operating System | OpenTX / EdgeTX Compatible |
| Control Channels | Maximum 16 (Rx dependent) |
| Display | 128*64 Monochrome LCD |
| Charging | Built-in USB-C Charging |
| Gimbal Type | Hall-effect |
| Module Bay | Nano size (Compatible with TBS Nano Crossfire / Nano Tracer / IRC Ghost) |
| Firmware Upgrade Method | Via USB or SD card (SD Not included) |
9. Warranty and Support
For warranty information and technical support, please refer to the official HTLNUZD website or contact their customer service directly. Keep your purchase receipt as proof of purchase for any warranty claims.
It is recommended to regularly visit the manufacturer's website for the latest firmware updates, FAQs, and support resources.