---
product_id: 54340954
title: "SoNNeT TECHNOLOGIES Echo Express SEL Thunderbolt One-Slot Low-Profile PCIe Card Expansion System"
brand: "sonnet"
price: "HK$7104"
currency: HKD
in_stock: true
url: https://www.desertcart.hk/products/54340954-sonnet-technologies-echo-express-sel-thunderbolt-one-slot-low-profile
store_origin: HK
region: Hong Kong
---

# 40Gbps Thunderbolt 3 speed Compact low-profile design Daisy-chain up to 5 devices SoNNeT TECHNOLOGIES Echo Express SEL Thunderbolt One-Slot Low-Profile PCIe Card Expansion System

**Brand:** sonnet
**Price:** HK$7104
**Availability:** ✅ In Stock

## Summary

> ⚡ Expand your workstation, shrink your footprint.

## Quick Answers

- **What is this?** SoNNeT TECHNOLOGIES Echo Express SEL Thunderbolt One-Slot Low-Profile PCIe Card Expansion System by sonnet
- **How much does it cost?** HK$7104 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/54340954-sonnet-technologies-echo-express-sel-thunderbolt-one-slot-low-profile)

## Best For

- sonnet enthusiasts

## Why This Product

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

## Key Features

- • **Secure & Ready:** Includes ThunderLok clip and premium 0.7m Thunderbolt cable to prevent accidental disconnects
- • **Compact Powerhouse:** Smallest Thunderbolt 3-to-PCIe chassis that fits seamlessly on any desk 📏
- • **Ultimate Connectivity:** Daisy-chain up to 5 Thunderbolt devices or connect dual 4K/one 5K display 🔗
- • **Plug & Play Versatility:** Works effortlessly with Mac and Windows PCs via Thunderbolt 3 USB-C port
- • **Blazing Fast PCIe Expansion:** Unlock 2750 MB/s bandwidth with Thunderbolt 3, doubling previous gen speeds ⚡

## Overview

The SoNNeT Echo Express SEL is a sleek, low-profile PCIe expansion system that leverages Thunderbolt 3 technology to deliver ultra-fast 40Gbps connectivity. Designed for professionals who demand high performance, it supports a single low-profile PCIe card and enables daisy-chaining of multiple Thunderbolt devices, making it the perfect compact solution for Mac and Windows users seeking to supercharge their setups without sacrificing desk space.

## Description

SoNNeT TECHNOLOGIES Echo Express SEL Thunderbolt One-Slot Low-Profile PCIe Card Expansion System

## Features

- Connects a PCIe Expansion Card to Computers Without Slots—Use high-performance PCIe cards with any Mac or Windows PC with a Thunderbolt 3 port (Low Profile Card only)
- 40Gbps Thunderbolt 3 Interface—Offers 2750 MB/s of PCIe bandwidth, doubling the performance of Thunderbolt 2
- Small Package, Full Performance—Smallest Thunderbolt 3-to-PCIe card expansion system available, supports the most popular low-profile, Thunderbolt-compatible PCIe cards at full performance
- Two Thunderbolt 3 (USB-C) Ports—One port reserved for connection to the computer; second port supports daisy-chaining of up to five additional Thunderbolt(5) devices to your computer, attaching a single USB(6) peripheral device, or connecting up to two 4K displays or one 5K display
- Thunderbolt Cable & ThunderLok Included—Includes 0.7-meter Thunderbolt 3 (40Gbps) cable and ThunderLok 3 Thunderbolt connector retainer clip to secure cable from accidental disconnections

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SoNNeT |
| Product Dimensions | 20.32 x 10.16 x 7.62 cm; 1.54 kg |
| Item model number | ECHO-EXP-SEL-T3 |
| Manufacturer | Sonnet Technologies |
| Series | SoNNeT Echo Express SEL Thunderbolt 3-to-PCIe Expansion Chassis (1 low profile slot) |
| Colour | Black |
| Form Factor | Low-profile |
| Hard Disk Description | Mechanical Hard Disk |
| Hard Drive Interface | Thunderbolt 3 |
| Graphics Card Interface | PCI Express |
| Operating System | Windows |
| Are Batteries Included | No |
| Item Weight | 1.54 kg |
| Guaranteed software updates until | unknown |

## Product Details

- **Digital storage capacity:** 16 GB
- **Hard disk interface:** Thunderbolt 3
- **Connectivity technology:** Thunderbolt
- **Brand:** SoNNeT
- **Special feature:** Portable
- **Hard disk form factor:** 3.5 Inches
- **Hard disk description:** Mechanical Hard Disk
- **Compatible devices:** Laptop, Desktop
- **Installation type:** External Hard Drive
- **Colour:** Black

## Images

![SoNNeT TECHNOLOGIES Echo Express SEL Thunderbolt One-Slot Low-Profile PCIe Card Expansion System - Image 1](https://m.media-amazon.com/images/I/61BjyJYLJrL.jpg)
![SoNNeT TECHNOLOGIES Echo Express SEL Thunderbolt One-Slot Low-Profile PCIe Card Expansion System - Image 2](https://m.media-amazon.com/images/I/61YY63SSltL.jpg)

## Questions & Answers

**Q: Can you use this with a graphics card?**
A: Hello there,

This product is not meant to be used with a graphics card.  Please check out the Sonnet eGFX Breakaway Box

**Q: Will this work with an intel 750 pcie ssd? aic or 2.5 form factor? will that work on a 2017 macbook pro?**
A: The Intel 750 PCIe SSD that is NVME will not be supported under Mac OS Sierra, but will work on Windows.  Whether the card works or not is dependent on the Operating System and not our product.  The 2.5" form factor should work on either Mac or Windows.

**Q: Any ideas on using this with wndows laptop w/ tbolt 3 to add a m.2 nvme ssd (samsung 960 evo, etcj ? an adapter card perhaps for internal slot?**
A: This product is compatible with thunderbolt 3 windows laptops.  So as long as the PCIe card is thunderbolt compatible it will work.  We also offer an all in one bus powered solution called the Fusion Flash Drive:
https://www.amazon.com/dp/B076HZHP1R

**Q: Hi would like to buy this product and use it with a magewell quad sdi capture and connect it to my laptop: https://www.amazon.com/dp/b01mr67wby/ref=c**
A: The SEL will only support a half-height, half-length PCIe card, so that card physically will not fit in the SEL

So the next question is will it work in a chassis like the Sonnet Echo SE I, that does have enough room for the card.  Unfortunately, we don’t know if that card is compatible over Thunderbolt or not.

In a hardware sense the card would most-likely be detected, but the main issue is if Magewell has ungraded their drivers to be compatible over Thunderbolt.  For that you would need to contact them directly to see if their card is certified for Thunderbolt or not.

## Frequently Bought Together

- Sonnet Echo Express SEL Thunderbolt 3-to-PCIe Expansion Chassis (1 Low Profile Slot)
- Blackmagic Design DeckLink Duo 2 4ch SDI Playback and Capture Card BMD-BDLKDUO2

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-22*