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Overview

MagTek’s uDynamo provides universal connection options for its users. 
The uDynamo secure card reader authenticator connects to a wide variety 
of devices* through its retractable headphone jack. It also provides a USB 
interface for connection with various devices including Windows or Mac PCs, 
and is perfect for use with a virtual terminal.
* (More than 221 mobile phones and tablets as of Feb 2014.)

Major Components

Connection:

USB and Audio Jack

Power: 

Battery powered; battery is charged from a 5V source, 
e.g., USB bus 

Card Speed: 

4 to 60 ips

Electrical Current:

100mA maximum during charge

Operating Temp: 

32°F - 113°F ( 0 - 45°C)

Operating Humidity: 

10% to 90% noncondensing

Power

uDynamo is powered by rechargeable internal Lithium-ion batteries. 
uDynamo can process up to 300 swipes on a single battery charge. If the 
reader is left ON, awaiting a card swipe, the battery will deplete in 3.5 hours. 
Recharging can take up to 6 hours.

Compatibility and Operating System

uDynamo works with all iOS and many Android devices. 

• 

Download and install the desired application for your device from the 
App Store or Google Play.

• 

Disconnect any headsets or devices that may be connected to the 
audio jack of your mobile phone/tablet.

• 

Connect uDynamo to the audio jack.

• 

Run your application.  Refer to your application for specific details.

• 

You are now ready to swipe magnetic stripe cards using your uDynamo.

Note: Some communication problems with the iPhone 4 have been 
discovered when using a WiFi connection.  It may require a few retries to 
complete a transaction.

uDynamo

Secure Card Reader Authenticator

Quick Installation Guide

Setup and Installation

MagTek  

®

 Inc., 1710 Apollo Court, Seal Beach CA 90740 | p 562-546-6400 | support 562-546-6800 | f 562-546-6301 | www.magtek.com

How to connect

A USB interface is provided to allow uDynamo to charge and as an optional 
communications interface for applications running on Windows or OS X. To 
charge the battery, connect the device to a USB host interface. Ensure the 
LED indicator shows that the battery is charging. Card transactions may 
be performed using either the Audio or USB interface while uDynamo is 
charging.

When using the audio interface, it is recommended for the host application 
to turn the reader ON only when ready to accept a card swipe and turn it 
OFF once the card information has been obtained. This will decrease the 
frequency of recharging.  Refer to your application for specific details.

Note: Please be certain to remove all audio headsets and  ensure mute is 
set to OFF and your volume is set to max. If you have a physical mute button 
on your device, it may not be automatically detected and you will need to 
turn mute OFF. Protect the uDynamo’s audio jack by folding it in when not 
in use. 

Commands

uDynamo has no user controls. It requires an application on the host 
computer or mobile phone/tablet to control the operation of the card reader. 
uDynamo connects to the mobile phone/tablet by plugging into the device’s 
audio jack.

SCRA magstripe swipe path

LED Indicator

Removable stabilizer grip
large or small (optional)

Folding audio jack

micro-USB connection

USB connection

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