Albatross V2.1 5.8GHz 180mm Antenna

All iFlight BNFs are tested before shipment to guarantee the highest quality. 

If you still encounter a problem after receiving your shipment, please immediately contact our iFlight customer support at www.iflightrc.freshdesk.com.

Introducing the new and improved Albatross V2.1 antenna! With upgraded welding technology and a unique rugged design, this antenna is now lighter, sturdier, and more reliable than ever. Upgrade your equipment today with the Albatross V2.1 antenna.

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Dec. 25, 2025: The antennas are upgraded to version 2.1, using LDS technology, and have more stable performance than V2.

A hexagonal shape for enhanced durability and a right-angle design for convenient fixation.

Utilizes ultrasonic welding technology to ensure a lightweight yet secure antenna attachment.

Achieves higher consistency in antenna gain, thereby improving device performance and stability.

The Defender series is proud to introduce its newest upgrade, equipped with the cutting-edge DJI O4 Air Unit Pro, delivering an unparalleled aerial filming experience. With enhanced transmission, crystal-clear imaging, and ultra-low latency, the Defender 25 sets a new standard for performance and reliability.

Get ready to push boundaries—Let’s meet the all-new Defender 25.

Interface: RHCP SMA, RHCP RP-SMA

Frequency range: 5.3GHz-6GHz 

Max Gain: 3.02dBi(5500MHz)

MIN Gain: 2.85dBi (5700MHz)

AVG Gain: 2.9dBi

MAX VSWR: 1.76(6000MHz)

MIN VSWR: 1.20(5300MHz)

AVG VSWR: 1.48

MAX radiation efficiency: 68.77%(5700MHz)

MIN  radiation efficiency: 65.17%(5300MHz)

AVG radiation efficiency: 66.51%

Polarization: RHCP 

Cross polarization suppression: -25dB

Axial Ratio：≤3

Cable: RG141

Weight: 12.2±0.5g

Size: Total length:180mm(±5mm)

Ultralight & Free to Fly

At sub 249g weight, our Defender25 doesn't require registration in most countries. The compact and lightweight design also makes it easy to carry and store. It will be your best travel buddy to redefine your FPV adventure.

Small But Mighty

The built-in 2.5inch propeller guards were designed to fly bold. You’ll experience a complete new creative freedom to fly whenever and wherever. The durable injection molded frame does not only prevent damage to your motors or propellers, but also protects the environment of small flight errors.

O4 Video Transmission, Enhanced Perception

Equipped with the latest DJI O4 Air Unit Pro, upgraded with a 1.1/1.3-inch image sensor, which captures delicate details in low-light environments. With a 155° ultra-wide angle, it captures breathtaking visuals. Enjoy real-time video transmission with up to 1080p/100fps for an immersive flying experience.(Source DJI)

Crash Protected Quick-Release Battery

Innovative quick-release battery and charging adapter to make everything as easy as it can be. The Defender25 comes with a stock 4S 550mAh. An Endurance 900mAh battery is optional.

Inbuilt high-performance Video and Receiver antennas

Optimized Landing Gear for Take-off in Complex Environment

Countless easy-to-use features let you get started right away: 

1) Secured XT30 Battery Plug with Anti-Spark Filter

2) Motors with direction arrows

3) Props with positioning column for easy installation

4) All ports and buttons are easy to access

5) Mini camera mount (Naked GoPro, Insta360, etc.)

Interface: LHCP

Frequency range: 5.3GHz-6GHz 

Max Gain: 3.05dBi(5500MHz)

MIN Gain: 2.85dBi (5800MHz)

AVG Gain: 2.95dBi

MAX VSWR: 1.74(5700MHz)

MIN VSWR: 1.19(5300MHz)

AVG VSWR: 1.5

MAX radiation efficiency: 68.89%(5500MHz)

MIN  radiation efficiency: 64.51%(5300MHz)

AVG radiation efficiency: 66.82%

Polarization: LHCP 

Cross polarization suppression: -25dB

Axial Ratio：≤3

Cable: RG141

Weight: 12.2±0.5g

Size: Total length:180mm(±5mm)

Product Name: Defender25 O4 4S HD

Flight Electronics: BLITZ D25 F7 AIO

Video Transmission: DJI O4 Air Unit Pro

Frame: 112±2mm

Motor: Defender25 1404

Prop: Defender25 2525 props (2.5 inch)

Weight of the Aircraft: 130±5g

Takeoff Weight: Approx. 201±5g (incl. 4S 550mAh)

Approx. 230±5g (incl. 4S 900mAh)

Dimensions (L×W×H): 158x155x37.5mm

Max Speed: 100km/h (Manual Mode)

Maximum Takeoff Altitude: 3500m

Max Hover Time: Approx. 6 min(with 550mAh battery), 10mins(with 900mAh battery)

Max Flight Distance: 2-3 km

Operating Temperature Range: -10° to 40° C (14° to 104° F)

Antennas: Dual Antennas

GNSS: GPS+SBAS+Galileo+QZSS+Glonass

2 x Albatross V2.1 5.8GHz 150mm Antenna

Note: FPV frame not included!

Product Name: DJI O4 Air Unit Pro 

Image Sensor: 1/1.3-inch

Lens: FOV: 155°

ISO: 100-25600

Video Resolution: 1080p/100fps H.265

Video Format: MP4, Max Video Bitrate: 130Mbps

Color Mode: Normal Mode/D-Log M

Stabilization: RockSteady 3.0+ ; Stabilization function off (When RockSteady is enabled, the shooting angle only supports standard.)

Live View Quality: 1080P@100fps

Operating Frequency: 5.170-5.250 GHz  & 5.725-5.850 GHz

Transmitter Power (EIRP): 5.1GHz＜23dBm(CE)/5.8GHz＜33dBm(FCC)/＜14dBm(CE)/＜30dBm(SRRC))

Max Video Transmission Range: With DJI Goggles 3/DJI Goggles N3: 15 km (FCC), 8 km (CE), 8 km (SRRC)

Communication Bandwidth: Max 60 MHz

Antenna: Dual antennas

Built-in Storage: 4GB

Supported SD cards: microSD (up to 512GB)

Operating Temperature: -10° to 40° C

Weight: Air Unit (camera module included): Approx. 32 g

Dimensions: Transmission Module: 33.5×33.5×13 mm (L×W×H)