# Optical Loss Test Sets EFB Elektronik 399900.1

**URL:** https://aio.lv/en/product--efb-elektronik-3999001--3214409
**Data updated:** 2026-01-07 09:55 (EET)
**Category:** Network Tools
**Manufacturer:** EFB Elektronik
**Manufacturer code:** 399900.1
**EAN:** 4049759064068
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 276.49 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 228.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--efb-elektronik-3999001--3214409

## 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 399900.1 is an Optical Loss Test Set (OLTS) designed for precise optical loss measurements. It supports FC, SC, and ST connectors and operates at a calibrated wavelength of 635 nm. Powered by AAA alkaline batteries, it is compact with dimensions of 12 mm in width, 167 mm in depth, and 12 mm in height, making it portable and easy to use for field testing.

## Long description

The EFB Elektronik 399900.1 visual locator is a compact handheld device for inspection and fault finding in fiber optic systems. Designed for daily use in the field, industrial environments and laboratories, it checks singlemode and multimode optical fibers, verifies faulty fiber-optic components and helps identify and patch fibers. The locator operates at a visible red wavelength of 635 nm and offers an operation distance of up to approximately 5 km due to its higher light output. It is compatible with 2.5 mm ferrule connectors including DIN, E2000, FC, SC and ST.
Advantages
The unit provides visible red light at 635 nm for easier fault location, a compact and portable form factor suitable for field and laboratory use, and compatibility with common 2.5 mm ferrule connectors (DIN, E2000, FC, SC, ST). Its higher optical power enables testing over an operation distance of around 5 km.
Suitable for
 Visual fault finding on singlemode and multimode fibers
 Checking and identifying fiber-optic connectors and patched lines
 Inspecting faulty fiber-optic components in the field, industrial sites or labs
Key specifications
 Brand: EFB Elektronik
 Model / MPN: 399900.1
 EAN: 4049759064068
 Wavelength: 635 nm (visible red)
 Compatible ferrules/connectors: 2.5 mm ferrule — DIN, E2000, FC, SC, ST
 Approximate operation distance: up to 5 km
 Power supply: AAA alkaline batteries
 Dimensions (W×D×H): 12 × 167 × 12 mm
How to use
Insert AAA alkaline batteries, connect the visual locator to the fiber connector or ferrule adapter matching the connector type, then switch the device on to emit visible red light at 635 nm. Visually inspect the fiber along its length and the connector ends to locate breaks, bends or faulty splices. Use the unit to identify individual fibers when patching or routing fiber lines.
Usage recommendations
Do not look directly into the light source. Use the locator only with compatible 2.5 mm ferrule connectors and follow standard fiber handling and safety procedures. For accurate loss measurements use appropriate calibrated OLTS instruments; this visual locator is intended for identification and fault finding rather than precision attenuation measurement.

## Specifications

| Feature | Value |
|---|---|
| Storage temperature (T-T) | -40 - 70 |
| Battery type | AAA |
| Operating temperature (T-T) | -10 - 45 |
| Number of batteries supported | 2 |
| Built-in display | No |
| Maximum cable length | 5000 m |
| Supported connectors | SC, ST, FC |
| Calibrated wavelengths | 635 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.06 kg |
| Height | 12 mm |
| Width | 12 mm |
| Depth | 167 mm |

### Battery

| Feature | Value |
|---|---|
| Battery technology | Alkaline |

### Technical details

| Feature | Value |
|---|---|
| Product colour | Black |
| Product type | Optical Loss Test Sets (OLTS) |

## FAQ

### How much does the Optical Loss Test Sets EFB Elektronik 399900.1 cost, and is it available for purchase?

The price is 276.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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: 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 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, product type, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Optical Loss Test Sets EFB Elektronik 399900.1?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/3214409/64206965_large.webp