# Mechanical keyboard switch tester eSTUFF MASTERKEY F1 ITH — single master key with USB compatibility

**URL:** https://aio.lv/en/product--estuff-masterkeyf1-ith--11265087
**Data updated:** 2026-02-14 19:40 (EET)
**Category:** Computer Component Accessories
**Manufacturer:** eSTUFF
**Manufacturer code:** MASTERKEYF1-ITH
**EAN:** 5715063540985
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 7.43 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--estuff-masterkeyf1-ith--11265087

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The eSTUFF MASTERKEY F1 ITH is a single master key device for keyboard testing and basic input use, featuring USB compatibility. Designed for checking switch actuation and response, it provides a compact solution for technicians and enthusiasts to evaluate mechanical switches or use as a simple programmable input. Connect via USB for power and data; ideal for repair, testing and development tasks.

## Long description

The eSTUFF MASTERKEY F1 ITH — single master key with USB compatibility is a compact device designed to test and evaluate mechanical keyboard switches and provide a basic programmable input. It connects via USB for power and data, allowing technicians and hobbyists to check switch actuation, travel, tactile feedback and electrical response in a convenient, standalone form factor. The device is intended for bench testing, quick diagnostics and simple input tasks during repair, development or switch evaluation workflows.
Advantages
The MASTERKEY F1 ITH offers a small footprint and USB compatibility, enabling easy connection to a PC or powered USB hub. Its single-key layout simplifies focused testing of switch actuation and response without the overhead of a full keyboard. The device is portable and straightforward to use, making it suitable for quick checks, repeatable switch presses and basic programmable input during assembly or debugging. Its design emphasizes utility for technical work rather than consumer typing comfort.
Suitable for
 Testing mechanical switch actuation and tactile response
 Quick diagnostics during keyboard repair and assembly
 Development tasks requiring a single programmable input
 Quality control checks in small-scale production or hobby projects
Key specifications
 Connection: USB for power and data
 Form factor: Single key / master key layout
 Primary function: Switch testing and basic input
 Use environment: Bench testing, repair, development
How to use
Connect the MASTERKEY F1 ITH to a computer or powered USB hub using a compatible USB cable. Once connected, the device will draw power from the USB port and register as a basic input device, allowing presses on the single key to be detected by testing software or operating system input tools. Use dedicated switch testing software or a simple text editor to observe actuation points, debounce behavior and repeatability. For diagnostics, press the switch repeatedly and monitor the input traces or on-screen indicators to evaluate tactile and electrical response.
Usage recommendations
For reliable testing results, use a stable USB connection and, if available, switch testing software that displays actuation and release events. Perform multiple actuations to confirm consistency and avoid applying excessive force beyond typical switch travel. Keep the device in a clean work area to prevent debris from affecting switch contacts and store it in protective packaging when not in use.

## FAQ

### How much does the eSTUFF MASTERKEY F1 ITH — single master key USB cost, and is it available for purchase?

The price is 8.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 90 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All eSTUFF products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized eSTUFF service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11265087/62189626_large.webp