EWRF 701U: Born in the Races, Built for VictoryIn 2018, Shenzhen-based FPV racers and RF engineers solved a critical dilemma: the trade-off between signal stability, weight, and simplicity. Traditional setups were fragile and interference-prone.The 701U emerged from China's toughest underground racing circuits. Its 3-in-1 integrated design (camera+VTX+antenna) delivers:- Zero-lag 600TVL clarity- Interference-resistant 5.8GHz transmission- 25mW power efficiency in a 3.6g packageProvenn by champions – from backyard pilots to Dubai Drone Prix – it’s not just specs, but reliability when it matters most.

User Guide 701U：How to Configure Your EWRF 701U VTX

After powering up, the red & blue LEDs will signal the fllowing two items of VTX in tum: channel and band. (The flashing times of the red and blue LEDs indicate the item and the value respectively. After that, the LEDs indicate the working modes : thered &blue LED areon.)

1. Select Channel	1. Press & hold button until red LED flashes once;2. Now tap button to cycle channels (1-8);3. Blue LED flashes indicate current channel (1 flash=CH1, 2=CH2, etc.)
2. Select Band	1. Press & hold button until red LED flashes twice;2. Tap button to cycle bands (A-F);3. Blue LED flashes indicate band (1=A, 2=B, etc.);
3. Flip Image (Optional)	1. Press & hold button until red LED flashes three times;2. Single tap to toggle vertical image flip;
4. Save Settings	1. Press & hold button to save and exit;2. VTX will reboot with new settings;
Tips:	1. Each configuration mode has distinct red LED flashes (1=Channel, 2=Band, 3=Flip);2. Blue LED shows your current selection;3. You must complete Step 4 to save any changes;

Description:

Parameter	Specification	Details/Notes
Product Name	EWRF 701U AIO FPV Camera & VTX	All-in-One design
Model Number	701U	2024 version
Frequency	5.8GHz	5655-5915MHz range
Channels	48CH	8 bands × 6 channels
Output Power	25mW	Fixed power output
Voltage Range	2.5-5.5V	Standard 5V operation
Current Draw	220mA (±10mA @5V)	Low power consumption
Antenna Type	Copper Tube Omnidirectional	RP-SMA connector, 2dBi gain
Camera Resolution	600TVL	1/3' CMOS sensor
Lens Specification	120° Wide-Angle, F1.4mm	Near-fisheye FOV
Video System	PAL/NTSC Auto-Detect	Auto-switching
Latency	<10ms	Camera-to-VTX processing
Signal-to-Noise	≥52dB	Low-noise imaging
Min. Illumination	0.01 Lux	Night-flight capable
Control Method	Button-operated	LED channel indicator
Image Adjustment	Flip/Rotate Supported	Via button combinations
Operating Temp.	-10°C to +60°C	Reliable in extreme conditions
Dimensions	13.5×15.9×17.2mm (L×W×H)	Ultra-compact design
Weight	3.6g (without antenna)	5.2g with antenna
Compatibility	Betaflight, DJI, FatShark, Eachine	Plug-and-play
Certifications	FCC, CE, RoHS	Meets international standards

Package Included:

1x EWRF 701U AIO FPV Camera & VTX

Note:

1. Make sure that there is enough space for airflow when insaling the module on the drone once the overheating protection starts to reduce the power even to shut down at the worst.

2. Please install the antenna before powering up for a longer use life.