Klowra effect pedals run on a 9 V DC supply with center-negative polarity and draw at least 250 mA. Using a lower-current or non-center-negative adapter can lead to unstable performance or even malfunction. For clean, noise-free operation, we strongly recommend an isolated power supply.

1. Download the latest firmware update file for your model from the relevant model page.

2. Connect the Klowra pedal to your computer using the USB-C data cable.

3. Hold down footswitch&the LED button while powering on, the LED flashing red.

4. Open the firmware update file. Click Update to begin installing the firmware.

5. After the successful update, the LED turns off. Restart the pedal and enjoy!

Or you can check the video here https://youtu.be/9qrA1X1UkVA?si=SEvKnr9ZI4UTPbgD

Yes!

Klowra effect pedals can be controlled by both an expression pedal and a footswitch via the CTRL jack.

Ctrl Jack Type: 1/4″ TRS balanced (Tip–Ring–Sleeve)

Connection & Setup:

Plug your TS or TRS footswitch/expression pedal into the CTRL jack.

The pedal’s LED will flash red, indicating it’s waiting to detect the controller.

While the LED is flashing, tap the footswitch or rock the expression pedal back and forth.

Once recognized, the LED will stop flashing and return to its normal color—your controller is now active.

Note:

If you don’t complete the LED-flashing detection process, some control functions may remain unavailable. Make sure to trigger the pedal repeatedly until the LED confirms successful pairing.

You can set the LED Button’s brightness in the Power-Up Modes.

Enter Power-Up Modes

• Press and hold the footswitch while powering on the pedal.

• The LED will flash to indicate you’ve successfully entered Power-Up Modes.

Adjust LED Brightness

• Rotate the bottom-right knob:

- Fully left for the dimmest setting

- Fully right for the brightest setting

Exit Power-Up Modes

• Short-press the footswitch again.

Note: In addition to the LED Button brightness, Power-Up Modes allow you to configure other features. For details, please refer to the user manual.