# Network Cable Tester EFB Elektronik 39939.1 Twisted Pair

**URL:** https://aio.lv/en/product--efb-elektronik-399391--1042562
**Data updated:** 2026-02-12 09:42 (EET)
**Category:** Cable testers
**Manufacturer:** EFB Elektronik
**Manufacturer code:** 39939.1
**EAN:** 4049759028961
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 8.26 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--efb-elektronik-399391--1042562

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.99 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

The EFB Elektronik 39939.1 network cable tester is designed for testing twisted pair cables. It features easy-to-read LED indicators for quick fault detection and supports various cable types. Compact and lightweight, it is ideal for both professional and personal use, ensuring reliable network connections.

## Long description

The EFB Elektronik 39939.1 Twisted Pair network cable tester is a compact instrument for verifying continuity and wiring of twisted pair cables. It provides quick visual feedback through easy-to-read LED indicators to help identify open wires, short circuits, and miswires. Designed for both professional installers and home users, this tester supports common twisted pair cable types and facilitates troubleshooting of network cabling installations.
Advantages
The tester's compact, lightweight construction makes it portable for field work and convenient for storage. Clear LED indication simplifies diagnosis by showing the status of each conductor without requiring specialized training. Battery-powered operation ensures use in locations without mains power, and a rugged housing increases durability during routine handling.
Suitable for
Verifying continuity and wiring order of Ethernet twisted pair cables (e.g., Cat5e, Cat6)
Troubleshooting network connection issues in offices and data closets
Quick field checks during cable installation and maintenance
Home network setup and verification
Key specifications
Function: continuity and wiring order testing for twisted pair cables
Indicators: multiple LEDs for per-conductor status and overall connection
Power supply: battery-powered for portable use
Compatibility: supports common twisted pair network cables
Form factor: compact and lightweight handheld design
How to use
Connect the main unit and remote terminator to the two ends of the cable under test using the appropriate RJ45 or modular connectors. Power the tester using the installed battery and observe the LED sequence to determine continuity and wiring order. Use the LED indications to identify open circuits, shorts, reversed pairs, or split pairs. Remove power and disconnect the cable after testing to conserve battery life.
Usage recommendations
Use the tester on de-energized low-voltage network cables only; avoid use on live telephone or mains wiring. Replace batteries when LED brightness decreases to maintain reliable readings, and store the unit in a dry environment to prolong service life.

## Specifications

| Feature | Value |
|---|---|
| Product colour | Green, Grey |
| Built-in display | No |
| Product type | Twisted pair cable tester |
| Supported connectors | RJ-11, RJ-12, RJ-45 |

## FAQ

### How much does the Network Cable Tester EFB Elektronik 39939.1 cost, and is it available for purchase?

The price is 9.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 354 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 23.07.2026 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: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay. 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 EFB Elektronik 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 EFB Elektronik 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/1042562/53688045_large.webp