RadioMaster Pocket ELRS Setup & Pairing Guide for SpeedyBee Mario Mini 25 O4

Looking for the perfect controller for your SpeedyBee Mario Mini 25 O4? The RadioMaster Pocket ELRS is compact, beginner-friendly, and pairs seamlessly with the drone’s built-in ExpressLRS receiver. This easy guide walks you through everything you need to get flying fast.

Why the RadioMaster Pocket?

• Ultra-portable gamepad design with hall gimbals for smooth control.
• Built-in ELRS 2.4GHz for reliable, low-latency connection.
• Long battery life and easy simulator support.
• Perfect match for the agile Mario Mini 25 — great for freestyle and cinematic flying.

What You’ll Need

• RadioMaster Pocket ELRS (2.4GHz version)
• SpeedyBee Mario Mini 25 O4 drone
• Charged 3S LiPo battery (450–650mAh recommended)
• USB-C cable for setup
• Betaflight Configurator (free download)

Step 1: Prepare the RadioMaster Pocket

1. Insert charged 18650 batteries (included or compatible).
2. Power on the radio and update to the latest ExpressLRS firmware if needed (via USB and the configurator tool).
3. Familiarize yourself with the controls — it’s intuitive right out of the box.

Step 2: Bind the Radio to the Mario Mini 25

The drone has a built-in ELRS receiver — binding is quick and simple.

1. Connect the drone to your computer with the USB-C cable and open Betaflight Configurator.
2. In the Ports tab, make sure the receiver UART is enabled.
3. Go to the Receiver tab and set the mode to CRSF.
4. Power on the drone (remove props for safety).
5. On the RadioMaster Pocket: Navigate to the ExpressLRS menu → Select Bind.
6. The drone should connect (look for confirmation on the radio screen or LED lights).

Test the sticks in Betaflight — they should respond smoothly. Done!

Step 3: Set Up the DJI O4 Video System

1. Power on your DJI Goggles (N3, Goggles 3, or compatible).
2. Follow the on-screen prompts to activate and bind the O4 Air Unit.
3. Adjust camera tilt if needed (20–30° works well for most flying).

The video feed is independent of the radio control, so you’ll have crisp HD footage right away.

Step 4: Pre-Flight Checklist

• Install propellers in the correct direction (match the arrows on motors and props).
• Arm the drone (props off) and verify motor spin direction.
• Check video feed in your goggles.
• Set low battery warnings in Betaflight or OSD.

Step 5: First Flight Tips

• Start in Angle mode for self-leveling and easier control.
• Fly low and smooth while you get comfortable.
• The Pocket’s compact size is great for longer sessions without fatigue.
• Practice in a simulator (Liftoff or VelociDrone) before your maiden flight.

Common Issues & Quick Fixes

• No bind — Ensure firmware versions match and try binding again.
• Sticks not responding — Confirm CRSF mode in Betaflight.
• Short range — Keep antennas clear and update to the latest ELRS firmware.

Ready to Fly?

The RadioMaster Pocket + Mario Mini 25 O4 is an unbeatable combo for beginners and enthusiasts alike. Grab your Pocket today and build the ultimate portable FPV setup!

Shop Now: RadioMaster Pocket ELRS | Mario Mini 25 O4 Bundle | Prop Guards & Batteries

Questions? Comment below or check our other guides for Walksnail setups and prop guard installation.