Another release of stock will be available 8th October 9am NZST. Join the Lectronz waitlist to be notified as soon as the kits are available for purchase!

US Customers

Please ignore the generic shipping warnings from Lectronz regarding tariffs and delays in shipments. All volume knob kits are shipped from us with tariffs pre-paid (the tariff is included in the shipping cost) resulting in no delays and no border clearance issues

Features:

• Simple, plug-and-play solution
• Compatible with major headunit brands
  • JVC1
  • Kenwood2
  • Alpine
  • Pioneer
  • Android Headunits (solderless control via USB!)3
  • Sony
  • Any headunit with resistive steering wheel control learning
• Remapable inputs using the Configurator Tool
• 5V USB powered. Plug directly into your headunit for power. No Soldering
• Fully open source hardware and firmware. This includes all design files, BOM, firmware, etc

1 JVC forces incremental volume control above certain values on select models. I am yet to find a way to bypass this.

2 Kenwood forces incremental volume control above certain values on select models. I have found a way to bypass this and have implemented it by default in the firmware. This may or may not work for your unit and your miles may vary.

3 Some Android headunits do not allow USB volume control. If that is the case with your unit, you can default back to using the resistance SWC mode of this kit for control input

Known Issues

• (27/08/2026) DMX-8710S slow to respond to inputs from Volume Knob Kit. Most likely due to Kenwood FW implementation as the unit is also slow to respond to its own volume touch buttons
• (15/09/2026) Cannot be used in parallel with Maestro RR/RR2 on Sony XAV-AX6000, XAV-AX3700. Most likely will not work in parallel with Maestro Modules on Sony units

RESWC Impact Map

Check out where our volume knob kits are in use around the world! >> RESWC Impact Map <<

What's in the box:

• 1pc Volume Knob Kit - includes controller board, encoder board and required connectors/cables

Optional Accessories:

• Black Aluminium volume knob cover/cap (large and small)
• 0.5m Braided USB C to A cable (data & power)
• 3.5mm jack pre-terminated SWC patch connector
• 3.5mm Steering Wheel Control (SWC) Input Splitter: Wire your OEM steering wheel control adapter in parallel with the Volume Knob Kit. No wire stripping, no soldering, easy installation
• USB Splitter: Power the volume knob kit while running wired Android Auto or Carplay through a single USB port on your headunit

Default SWC Outputs

INPUT	OUTPUT
Volume Knob CW	Volume +
Volume Knob CCW	Volume -
Button Short Press	Mute
Button Long Press	Next Track
Button Double Press (Gen. Resistive Mode)	Enable Learning Mode
Button Double Press (Other Modes)	Previous Track

Remapping Outputs

Your kit can be configured on the fly! Use the Volume Knob Kit Configurator Tool and truly make your Volume Knob Kit your own. Map all the inputs to any of the supported outputs.

Documentation and Source Code

• User Guide
• Video Demos
• Hardware Documentation and Source
• Firmware Source

Is this just as good as a volume knob built into my stereo?

Unfortunately, no. The knob built into car stereos control the "absolute" volume and allows for cool functions such as acceleration of the volume when you really wrench on the knob.

This kit taps into your car stereo's steering wheel control input. Using this input, the Volume Knob Kit can only request volume increments or decrements at a pre-defined rate (dependent on the protocol overhead of each brand).

We have tuned the encoder and Microcontroller for this product to be as responsive as possible to your input! If you are not happy with the end result, let us know and we will action a response asap!

Shipping

Please note, the price of this item is exclusive of GST and/or VAT etc. Any import taxes and duties shall be borne by the customer.

• Note: Only US shipping price includes prepaid tariffs (DDP) as this must be paid by us on behalf of you before shipping
• NZ customers: We are Auckland based (Rosedale). If you would like to pick up your order, please let us know beforehand and we can provide you a free pick up option with the site!

Warranty and Returns

We will happily accept warranty claims for products that are DOA. If your headunit ends up being incompatible, we will also happily provide a refund. Buyer's remorse will not be warrantied or refundable.

Compliance

FCC Compliance Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired operation.

New Zealand and Australia

This device is compliant with the following standards:

1. AS/NZS CISPR 32:2015 AMD 1:2020

We ship worldwide unless explicity stated. Import taxes and/or tariffs to be borne by the customer unless explicitly stated. All US orders are shipped with tariffs pre-paid. There will be no delays or extra payments during shipping.