# USB-A to RS-232 Cable UGREEN 20210B, 1 m, Black

**URL:** https://aio.lv/en/product--ugreen-20210b--11861084
**Data updated:** 2026-03-09 17:37 (EET)
**Category:** USB Data Cables
**Manufacturer:** UGREEN
**Manufacturer code:** 20210B
**EAN:** 6957303801893
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 13.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 11.56 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ugreen-20210b--11861084

## 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

UGREEN USB-A to RS-232 cable (model 20210B) is a 1 m black interface cable that connects devices with a serial RS-232 port to a USB-A host. It provides a direct wired link for serial communication, data transfer, device configuration and legacy equipment connectivity. Suitable for connecting modems, industrial controllers, POS terminals and other RS-232 devices to modern computers.

## Long description

UGREEN USB-A to RS-232 Cable 20210B is a 1 m black interface cable designed to connect devices with an RS-232 serial port to a computer or host with a USB-A port. The cable provides a direct wired link for serial communication and data transfer, enabling configuration and operation of legacy equipment and peripherals that still rely on RS-232 connections. The compact design and single-cable solution remove the need for separate adapters and simplify wiring when integrating modems, routers, industrial controllers, POS terminals and other serial devices with modern systems.
Advantages
This USB-A to RS-232 cable offers plug-and-play connectivity with a sturdy molded connector housing and integrated electronics to handle signal conversion between USB and RS-232 levels. The 1 m length balances reach and cable management for desktop and rack environments while the black jacket provides discreet appearance and basic abrasion resistance. The cable reduces installation complexity compared to multi-component converter setups and supports reliable point-to-point serial communication for configuration, diagnostics and data exchange.
Suitable for
Connecting legacy serial devices such as modems and barcode scanners to modern computers
Interfacing industrial controllers, PLCs and instrumentation for configuration and monitoring
Linking POS terminals, receipt printers and other retail equipment with RS-232 ports
Serial console access for network equipment and embedded systems
Key specifications
Cable type: USB-A to RS-232 serial cable
Length: 1 meter
Color: Black
Connector on host side: USB Type-A (male)
Connector on device side: DB9 RS-232 (male/female orientation per device compatibility)
Function: Signal level conversion for serial communication (USB to RS-232)
Typical uses: Data transfer, device configuration, serial console access
How to use
Connect the USB-A plug to an available USB port on your computer and attach the RS-232 connector to the serial port of the target device. If required by the operating system, install the driver supplied by the system or available from the device vendor; many modern systems detect and configure the cable automatically. After the connection is established, open the appropriate serial terminal or application, select the corresponding COM port and set the correct baud rate, parity, data bits and stop bits to match the connected device. Perform configuration, data transfer or diagnostics as needed.
Usage recommendations
For stable communication, verify serial port settings and use shielded USB ports when available. Keep cable length to the specified 1 m to avoid signal degradation, and route the cable away from high-voltage or strong RF sources. If you experience driver or connectivity issues, check device manager for COM port assignment and update drivers from the manufacturer.

## FAQ

### How much does the UGREEN USB-A to RS-232 Cable 20210B 1 m cost, and is it available for purchase?

The price is 13.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 74 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, 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 UGREEN 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 UGREEN 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/11861084/67259150_large.webp