---
product_id: 17430549
title: "Iridium Portable Auxiliary Antenna M1621HCT-EXT"
brand: "bluecosmo"
price: "¥30961"
currency: JPY
in_stock: true
reviews_count: 4
url: https://www.desertcart.jp/products/17430549-iridium-portable-auxiliary-antenna-m1621hct-ext
store_origin: JP
region: Japan
---

# Sleek Black 5' Cable 1 Channel Iridium Portable Auxiliary Antenna M1621HCT-EXT

**Brand:** bluecosmo
**Price:** ¥30961
**Availability:** ✅ In Stock

## Summary

> Stay Connected Anywhere! 🌍

## Quick Answers

- **What is this?** Iridium Portable Auxiliary Antenna M1621HCT-EXT by bluecosmo
- **How much does it cost?** ¥30961 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/17430549-iridium-portable-auxiliary-antenna-m1621hct-ext)

## Best For

- bluecosmo enthusiasts

## Why This Product

- Trusted bluecosmo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Iridium Certified:** Trust in a product that meets the highest standards of satellite technology.
- • **Broad Compatibility:** Easily connects with multiple Iridium satellite phone models for ultimate convenience.
- • **Compact & Lightweight:** Designed for portability, making it the perfect companion for your adventures.
- • **Unmatched Connectivity:** Experience seamless satellite communication, even in the most remote locations.
- • **Versatile Applications:** Ideal for commercial and industrial use, ensuring reliability in demanding environments.

## Overview

The Iridium Portable Auxiliary Antenna M1621HCT-EXT is a certified, compact, and lightweight external antenna designed for optimal satellite communication. With a 1,500mm cable and compatibility with various Iridium satellite phones, it ensures reliable connectivity in extreme conditions, making it a must-have for professionals on the go.

## Description

Iridium Portable Auxiliary Antenna M1621HCT-EXT

## Features

- CERTIFIED: Iridium certified passive external magnet mount antenna with 1,500mm (5') and Iridium TNC connector. Connect directly to your Iridium satellite phone's external antenna adapter
- NEW: This Maxtena M1621HCT-EXT is now included with most Iridium Extreme and Iridium 9555 satellite kits and replaces flat style Iridium auxiliary antenna SYN7391A.
- VERSITILE: The very small size and light weight make this helical Iridium antenna unique in the market and perfect for various commercial and industrial applications. This antenna is the ideal solution for the most extreme and demanding applications where reliable satellite reception and high accuracy are required. It can be used to boost the performance of the Iridium handsets among other uses.
- COMPATIBILITY: Works with Iridium satellite phones using the external antenna adapter. Iridium Extreme, Iridium 9555, Iridium 9505A, Iridium 9505 & Iridium GO!
- Part Number: 100-00044-01

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of Channels | 1 |
| Color | Black |

## Product Details

- **Antenna:** Satellite
- **Brand:** BlueCosmo
- **Color:** Black
- **Number of Channels:** 1
- **UPC:** 720825292571
- **Manufacturer:** Maxtena
- **Number of Items:** 1

## Images

![Iridium Portable Auxiliary Antenna M1621HCT-EXT - Image 1](https://m.media-amazon.com/images/I/31-d8zgCDkL.jpg)
![Iridium Portable Auxiliary Antenna M1621HCT-EXT - Image 2](https://m.media-amazon.com/images/I/313Mlp+RWsL.jpg)
![Iridium Portable Auxiliary Antenna M1621HCT-EXT - Image 3](https://m.media-amazon.com/images/I/41sN70QtxwL.jpg)
![Iridium Portable Auxiliary Antenna M1621HCT-EXT - Image 4](https://m.media-amazon.com/images/I/31-5b3s9JSL.jpg)

## Questions & Answers

**Q: Does it plug into the irridium go?  do i need the external adapter to plug this roof top antenna to the irridium go?**
A: I bought this antenna and the adapter to use with my Iridium Go on my RV.  It works great.  There's no metal on the roof of my RV to stick the antenna to, so I glued a large metal washer to the roof, and the antenna sticks to it just fine.

BlueCosmo Iridium Portable Auxiliary Antenna M1621HCT-EXT
BlueCosmo Iridium Go External Antenna Adapter

**Q: How long is the cable of the antenna?**
A: The cable length is  1500mm (5 Foot)

**Q: Could this be used with a delorme inreach se?**
A: Had to get adapter

**Q: I have the flat version external antenna . is this one better gain? thanks! i currently have sat service with bluecosmo and it's great.**
A: This is much smaller I have the flat version too.  The pic makes it look larger than it is.  I have used this for over a year and it is wonderful.  The cable is rather short, check the length for your needs.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Awesome
*by E***E on November 27, 2023*

My husband goes 100 miles off shore fishing and I can hear him loud and clear

### ⭐ Terrible product
*by P***A on May 18, 2019*

Terrible product

### ⭐⭐⭐⭐⭐ a longer feed line would be nice but that would be more loss of signal
*by C***. on May 13, 2017*

it is very small, but works well. a longer feed line would be nice but that would be more loss of signal.

## Frequently Bought Together

- Iridium Portable Auxiliary Antenna M1621HCT-EXT
- BlueCosmo Iridium GO! 9560 External Antenna Adapter
- Iridium Mobile Antenna External Magnet Mount by BlueCosmo Satellite

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-28*