# Light injector EFB Elektronik 39990.1

**URL:** https://aio.lv/en/product--efb-elektronik-399901--1043511
**Data updated:** 2026-01-07 09:55 (EET)
**Category:** Network Tools
**Manufacturer:** EFB Elektronik
**Manufacturer code:** 39990.1
**EAN:** 4049759064044
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 208.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 172.31 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--efb-elektronik-399901--1043511

## 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 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

The EFB Elektronik 39990.1 is a light injector designed for network testing, compatible with FC, SC, and ST connectors. It features a compact design with a width of 167 mm and a depth of 12 mm, weighing only 60 g. Powered by AAA alkaline batteries, it ensures reliable performance for network diagnostics.

## Long description

The EFB Elektronik 39990.1 light injector is a compact visual locator for daily use in fiber optic applications. It is designed for network testing and is compatible with FC, SC and ST connectors. With a width of 167 mm, a depth of 12 mm and a weight of 60 g, the unit is suitable for field, industrial and laboratory environments and for checking single‑mode and multi‑mode optical fibers, locating faulty fiber optic components and identifying and patching fibers.
Advantages
Compact and lightweight construction simplifies carrying and handheld operation. Compatibility with FC, SC and ST connectors allows testing across common connector types. Battery operation using AAA alkaline batteries provides convenient, portable power without need for mains supply. The device’s design supports routine checks, troubleshooting and fiber identification tasks.
Suitable for
 Testing and tracing single‑mode optical fibers
 Testing and tracing multimode optical fibers
 Identifying and patching individual fibers in cabling
 Locating faulty fiber optic components during maintenance
 Field, industrial and laboratory network diagnostics
Key specifications
 Brand: EFB Elektronik
 Model / MPN: 39990.1
 EAN: 4049759064044
 Connector compatibility: FC, SC, ST
 Dimensions (approx.): width 167 mm, depth 12 mm
 Weight: 60 g
 Power: AAA alkaline batteries
How to use
Insert AAA alkaline batteries according to the polarity markings, connect the appropriate connector (FC, SC or ST) to the fiber or adapter under test and switch on the light injector. Observe the light output at the far end of the fiber or use it to trace individual fibers within a bundle. Turn the device off after use to conserve battery life and remove batteries if the unit will be stored for extended periods.
Usage recommendations
Use the EFB Elektronik 39990.1 in a darkened or low‑light environment to improve visibility of the injected light. Handle connectors and fiber ends carefully to avoid contamination or damage; inspect and clean connectors before use according to standard fiber‑handling procedures.

## Specifications

| Feature | Value |
|---|---|
| Storage temperature (T-T) | -40 - 70 |
| Battery type | AAA |
| Operating temperature (T-T) | -10 - 45 |
| Number of batteries supported | 2 |
| Manual | Yes |
| Fiber mode structure | Single-mode, Multi-mode |
| Built-in display | No |
| Supported connectors | ST, SC, FC |

### Packaging content

| Feature | Value |
|---|---|
| Batteries included | Yes |

### Battery

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

### Technical details

| Feature | Value |
|---|---|
| Product colour | Grey |
| Product type | Light injector |

### Weight & dimensions

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

## FAQ

### How much does the Light injector EFB Elektronik 39990.1 cost, and is it available for purchase?

The price is 208.49 € (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: product type, weight, 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.

## Image

https://aio.lv/img/cache/product/1043511/64130006_large.webp