---
product_id: 16598812
title: "OMNIKEY 3121 USB Card Reader"
brand: "hid"
price: "£27.30"
currency: GBP
in_stock: true
reviews_count: 13
category: "Hid"
url: https://www.desertcart.co.uk/products/16598812-omnikey-3121-usb-card-reader
store_origin: GB
region: Great Britain
---

# LED indicator for card status Compact 2.64 x 3.15 x 1.1 in design Plug & play USB connectivity OMNIKEY 3121 USB Card Reader

**Brand:** hid
**Price:** £27.30
**Availability:** ✅ In Stock

## Summary

> 🔐 Unlock secure access with style and ease — your trusted card reader companion.

## Quick Answers

- **What is this?** OMNIKEY 3121 USB Card Reader by hid
- **How much does it cost?** £27.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/16598812-omnikey-3121-usb-card-reader)

## Best For

- hid enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Portable:** Sleek, lightweight design fits perfectly on any desk or workspace without clutter.
- • **Visual Confirmation:** Integrated LED indicators ensure you know exactly when your card is fully inserted and ready.
- • **Plug & Play Simplicity:** No drivers needed—just connect and authenticate instantly, saving you precious time.
- • **Durable Everyday Performer:** Trusted by professionals for over a year of reliable use, built to keep up with your demanding workflow.
- • **Seamless Mac & DoD Compatibility:** Effortlessly works with Mac OS and Department of Defense CAC cards, making it the go-to for security pros.

## Overview

The HID OMNIKEY 3121 USB Card Reader is a compact, plug-and-play device designed for secure card authentication, especially compatible with Mac OS and DoD CAC cards. Featuring LED status indicators and a balanced cable length, it offers reliable, durable performance favored by security-conscious professionals.

## Description

OMNIKE 3121 TAA QTY 10-1990

Review: Good product - works as advertised. - The card reader works right out of the box, I would buy this again from this seller.
Review: Great for DoD Card Holders and with Mac OS - I've had this for over a year now, it has yet to fail me. First off, I work for a military branch and own nothing but macs, so it's hard to find reliable CAC readers. This one works great for CACs and for any apple computer. It's durable and has worked for me well for over a year now without any issues. It has a sticky sticker incase you have a permanent place for it, however, if you do not, it has a stand. PROS The cord is not too long, and not too short. Just right. Design is great Sticker You know when the card is in all the way with LEDs CONS Feels kinda of cheap, made out of cheap plastic

## Features

- UPC: 639399046315
- Weight: 0. 350 lbs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00AT4NX8S |
| Best Sellers Rank | #448 in Computer Memory Card Readers |
| Brand | HID |
| Color | Two-tone Gray |
| Customer Reviews | 4.3 4.3 out of 5 stars (359) |
| Date First Available | March 30, 2009 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 2.64 x 3.15 x 1.1 inches |
| Item Weight | 3.46 ounces |
| Item model number | R31210049-1 |
| Manufacturer | HID Global |
| Power Source | Information Not Available |
| Product Dimensions | 2.64 x 3.15 x 1.1 inches |
| Series | HID GLOBAL |

## Images

![OMNIKEY 3121 USB Card Reader - Image 1](https://m.media-amazon.com/images/I/51FobDiHsWL.jpg)

## Questions & Answers

**Q: Is this also a writer to chip??**
A: This is a reader/writer.

**Q: Does this card reader work with a VA PIV card?**
A: Yes it does! Works great if you're going to use it for remote work.

**Q: Is this omnikey 3121 version 1, version 2 or version 3?  version 3 does not work with the c2 rower i have**
A: Please see the information at https://www.concept2.com/service/software/concept2-utility/card-reader-overview-and-requirements 
Only Versions 1 and 2 work with the concept2 utility program. I suggest you return to the supplier and swap it with version 1 or 2.

**Q: If you have an hid prox card will this work with that**
A: I don't anything about a hid prox card.  This works with a smart-card.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product - works as advertised.
*by J***. on August 23, 2025*

The card reader works right out of the box, I would buy this again from this seller.

### ⭐⭐⭐⭐⭐ Great for DoD Card Holders and with Mac OS
*by D***. on July 14, 2013*

I've had this for over a year now, it has yet to fail me. First off, I work for a military branch and own nothing but macs, so it's hard to find reliable CAC readers. This one works great for CACs and for any apple computer. It's durable and has worked for me well for over a year now without any issues. It has a sticky sticker incase you have a permanent place for it, however, if you do not, it has a stand. PROS The cord is not too long, and not too short. Just right. Design is great Sticker You know when the card is in all the way with LEDs CONS Feels kinda of cheap, made out of cheap plastic

### ⭐⭐⭐⭐⭐ Accurate high speed smart card reader that works on Windows and Linux
*by H***K on November 22, 2019*

Very good product, much better than other smart card readers. Can require some effort to set up on some Linux distributions. Overall I can definitely recommend this product. The physical design of the product is also well made and will probably last a lot longer than other readers I've bought from other manufacturers. This product can also read full sized SIM cards for e.g. research purposes.

## Frequently Bought Together

- HID OMNIKEY 3121 USB Card Reader
- Deftun Card Reader Writer USB Swipe Encoder 3 Tracks MSR605X
- Bodno J2A040 Chip Java Jcop Cards W/Hico 2 Track Mag Stripe Jcop21-36K - 10 Pack White with Black Mag

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**Shop now:** [https://www.desertcart.co.uk/products/16598812-omnikey-3121-usb-card-reader](https://www.desertcart.co.uk/products/16598812-omnikey-3121-usb-card-reader)

---

*Product available on Desertcart Great Britain*
*Store origin: GB*
*Last updated: 2026-04-27*