General usage

  • Insert the card into the slot at the top of the SumUp Lite Card Reader with the chip facing you

  • Tap the card on the display of the card reader for 1-2 seconds for contactless (NFC) payments

  • Swipe the card through the slot at the top of the card reader from left to right with the magnetic stripe facing you

  • Pay using Google Pay and Apple Pay by holding your smartphone/watch over your card reader

For more information on accepting card payments, click here.

Your device has 4 blue lights at the bottom of your card reader:

  • As soon as you switch on the SumUp Lite Card Reader, one LED will blink to indicate “power on”. It will continue to blink every 4 seconds to signal that the device is still on.

  • The LEDs also flash when a connection between the card reader and a smartphone/tablet is established.

  • If you’re processing an NFC transaction, a single LED will blink. Once the card is tapped on the reader, all 4 LEDs will blink.

  • The LEDs also signal the battery level of your reader. 4 LEDs indicate 100%, 3 indicate 75%, etc. If only one LED is blinking, it’s time to charge your card reader.

We recommend only using your device at temperatures ranging between  14°F and +113°F. Your card reader can be affected outside of this range, so we suggest not leaving it in exposed places for long periods of time (e.g. in your car during summer or winter).

To protect your SumUp Lite Card Reader from manipulation or tampering, we have designed it with security sensors in place. Make sure you always handle it with care and avoid force or impact to prevent the automatic security lock from being enabled. Once triggered, the device will be permanently locked.

To ensure optimal processing speed, make sure your card reader is always at least 25% charged or higher. We recommend charging it on a monthly basis, even if you don’t use your SumUp Lite Card Reader regularly.

You can view your battery level on the screen of your reader and via the LED on the card reader (see LED lights for more information). 

Charge your card reader with the Micro USB cable included in the package by connecting it to a computer or power supply. Don’t worry, you can still use your SumUp Lite Card Reader while it is charging and once it’s at 100% you can process up to 300 transactions before charging it again.

Your card reader requires a Bluetooth connection of 4.2 or higher. The SumUp App uses the internet connection from your smartphone or tablet. However, the file size of the data transferred between your device and card reader is very small, and should not have a big impact on your data plan.

In the "Sales" section on, you can find a list of all transactions performed with SumUp with details such as date, time, and transaction amount. If you need to resend a receipt to a customer, this is where to do it.

The following functions are available within the settings of the SumUp App:

Tipping: Set the default tipping rate for your account

Printing: Pair to a nearby printer

Employees: Add employees to enable them to use your reader

My Products: Turn on and off your Product Catalog

Taxes: Adjust tax rates for your products and services

Payment settings: Turn on and off Cash Payments; connect new card readers to your account

Support: Detect your card reader for pairing to your mobile device, and access or email our Support Center

Your Merchant ID can be found in the top left-hand corner of You can find all of the other information relating to your SumUp Profile below "Profile".

You can issue customer refunds with the SumUp App. Want to know more? Visit ourRefund transactions article for more information.

Standby Mode vs Power Off

Your SumUp Lite Card Reader will go into standby mode after some time without use. But don’t worry, it’ll stay connected to your device. You can also power off your card reader by holding down the power button for around 3 seconds.