Alientech DUO II Amplified Dual Band Antenna System Now supports Mavic — Covert Drones Skip to content

Alientech DUO II Amplified Dual Band Antenna System Now supports Mavic 3 and Autel Smart controller AND MANY MORE


Please NOTE: This antenna fits MULTIPLE drones.  Please select your drone in the drop down.  For some reason the site i have host my store is only allowing one photo in the product.  So for the time being please forgive me until the bug is fixed.  



ALIENTECH DUO signal booster is a fantastic, active directional antenna with two power amplifiers for a range extender, applicable to the 2.4Ghz-2.4835Ghz and 5.725Ghz-5.850Ghz frequency band.

With a substantial transmission gain of 28-30dBi, a significant receiving gain of 23-25dB, it can enhance wireless signal strength, lengthen the transmission distance and stabilize signal reception, and it supports wifi and OcuSync Protocol.

It has been proven with actual use tests that controllability will be remarkably improved after installation. That drone distance will be three times more than that of the original one. You can even easily break the flight limit of the drone’s power, and obtain an especially sound manipulation in the interference area with excellent anti-interference performance.
PRO2.4G booster can not only effectively stretch the signal distance of 2.4G drone, but facilitate storing and using given its small size. The function of Quick release saves your take-off preparation time to the greatest. Inside the booster, here are two 18650@2500 mAh rechargeable lithium batteries, which can be used continuously for over 300 minutes each time.


  • This product is developed specifically for 2.4 GHz and 5.8 GHz frequency bands. 2.4G is compliant with the IEEE 802.11B/G/N standard and 5.8 is a bidirectional power amplifier that complies with the IEEE 802.11A/N standard. The product matches frequency spread techniques such as direct sequence (DSSS) and orthogonal frequency division multiplexing (OFDM). Using TIME DIVISION DUPLEX (TDD) fast microwave detection technology and linear power amplifier technology, it greatly expands the wireless RF communication distance while keeping the transmission rate of 802.11B/G/N wireless devices unchanged.



Product model: DUO-2458SSB
Dual-Band, Work with 2.4G and 5.8G
Working Frequency Band: 2400-24835 GHz / 5.725-5.850GHz
Working Voltage: 6-9V 
Antenna Gain: 2.4G>13 dBi±1 / 5.8G>15dBi±1
Receive Gain: 10 dB±1
Transmit Gain: 15 dB±1
Input power range: 10-20 dBm
EVM: 3%@28 dBM 802.11G 54 Mbps OFDM 64QAM BW 20 MHz
Electric current435 mA@POUT 28 dBm 9V
Noise coefficient: 2.5 dB
Transmission delay: 1 μs
Temperature: -40°C~80°C
Battery voltage and capacity: 3.7V 2800 mAh




  • ATTENTION: Please pay attention before you place an order. You need to disassemble the original remote and remove the original antenna before you install the cable. In theory, although the installation process is non-destructive installation. However, you still have the risk of damaging the original remote control and losing the warranty for the remote control or drone. And users need to be careful that the outer insulation layer and shielding metal layer of the coaxial cable are intact.
  • Before installation, please watch the video teaching carefully to ensure the correct installation of the cable. Be careful to use the tool to ensure that the cable is not broken, twisted, or damaged. We do not recommend this cable to be installed repeatedly. Only one pair of cables is included in this package. It will include any tools for retrofitting.  Once the antenna wrap and, install package opened, no returns are offered when you are doing the install yourself.  A guarantee against any defects would still be covered for a replacement of bad part or antenna.
  • Please note that the DJI smart controller, mavic 3, Mavic Air 2 controller and the Mavic mini 2 controller all require professional install UNLESS youre out of the USA. This is due to the difficulty of the mod to these remotes. 

Customer Reviews

Based on 7 reviews
DOA, doesn’t charge

Doesn’t charge, DOA

Tim Haslett
Works great!

No complaints. Works wonderfully!

Kevin Moore
Excellent Products - Excellent Customer Service - Fast delivery On Time

I Recommend Covert Drones, a big thank you to Luke the owner for all his help.

Excellent Products, Works as Advertised

The DUO II has turbo charged the transmission performance on my EVO 2 Pro V2! The distance and transmission quality is outstanding and made this a no regrets purchase. Luke, the owner, proved customer service is alive and well. He modified the stock controller the day he received it and made sure to I was dialed-in on how to use it. Definitely will turn to Covert Drones for any future drone needs! A+ all around!

Randall Barbee
Still haven't received my complete order!

I ordered this antenna on Sep 17th and as of Oct 4th have not rcvd the parts that were missing when it partially arrived on Sep 28th. Oh yeah, and I paid over $100 thus far in express shipping fees. $40 of which has since been refunded. Still pretty crazy that it takes almost a month to get something shipped from state to state, inside the U.S.