# Kramer HDMI AV USB 2-way PoE Smart Transmitter & 2x1 Switcher EXT3-21-XR-TR

**URL:** https://aio.lv/en/product--kramer-50-80584090--11518600
**Data updated:** 2026-02-15 12:45 (EET)
**Category:** Video Switches & Splitters
**Manufacturer:** Kramer
**Manufacturer code:** 50-80584090
**EAN:** 7291063098513
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 1 399.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 1 156.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kramer-50-80584090--11518600

## 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

Kramer EXT3-21-XR-TR is an HDMI AV USB 2-way PoE smart transmitter and 2x1 switcher designed for AV signal routing. It supports HDMI and USB connectivity, two input paths with switcher functionality, and PoE power for simplified installation. Intended for meeting rooms, classrooms and small AV systems, it enables seamless source selection and easy integration into networked AV setups.

## Long description

Kramer EXT3-21-XR-TR is an HDMI AV USB 2-way PoE smart transmitter and 2x1 switcher engineered for reliable AV signal routing in small to medium installations. The unit provides two HDMI/USB input paths with integrated switching logic and transmits audio-video and USB data over a networked AV link. PoE support simplifies deployment by allowing power delivery over the network cable, reducing the need for local power adapters. The device is intended for meeting rooms, classrooms and compact AV systems where source selection, USB peripheral sharing and simplified cabling are required.
Advantages
The EXT3-21-XR-TR combines HDMI and USB handling in a single compact transmitter with built-in 2x1 switcher functionality, enabling seamless selection between two sources without additional external switchers. Power-over-Ethernet capability streamlines installation and lowers cable clutter while preserving full HD video and multichannel audio transmission. Smart transmitter features support remote control and integration into managed AV networks, facilitating centralized routing and monitoring.
Suitable for
 Small and medium meeting rooms requiring easy source switching and USB device sharing
 Classrooms and training spaces with mixed HDMI and USB input devices
 Huddle spaces and collaboration areas where PoE deployment reduces outlet needs
 Networked AV systems that need compact transmitters with local switching
Key specifications
 HDMI video transmission supporting standard resolutions for meeting-room applications
 USB 2-way support for sharing USB peripherals between endpoints
 2x1 switching: two input paths with selectable source routing
 Power-over-Ethernet (PoE) support for powered operation over a single network cable
 Ethernet connectivity for networked AV integration and remote control
 Compact form factor suitable for table- or rack-adjacent placement
How to use
Connect HDMI and USB sources to the device’s input ports and attach the unit to the AV network via the Ethernet port. If PoE is available from the network switch, the transmitter will receive power through the network cable; otherwise use an appropriate local power option if provided. Use the device’s switching controls or the integrated network management interface to select the active input. Route the transmitted HDMI and USB signals to a compatible receiver or networked endpoint to distribute audio, video and USB peripheral data to displays or host systems.
Usage recommendations
For best performance, use shielded CAT6 or higher network cabling for the AV link, ensure network switches provide the required PoE class, and confirm connected displays and USB devices support the intended resolutions and data rates. Regular firmware updates and centralized monitoring improve reliability in managed AV environments.

## FAQ

### How much does the Kramer EXT3-21-XR-TR HDMI AV USB 2x1 Switcher cost, and is it available for purchase?

The price is 1,399.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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, Leasing for legal entities. 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 Kramer 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 Kramer 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