# Internal COM Expansion Card adapter Lenovo — RS-232 output, BTB host interface, male, green, 39.5×36.2×1.6 mm

**URL:** https://aio.lv/en/product--lenovo-4xh1k25073--11196115
**Data updated:** 2025-12-30 18:31 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** Lenovo
**Manufacturer code:** #4XH1K25073
**EAN:** 0195892090182
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.99 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 13.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lenovo-4xh1k25073--11196115

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.89 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

Lenovo internal COM Expansion Card provides an RS-232 output via a BTB (board-to-board) host interface with a male connection. Designed for PC integration, the compact green adapter measures 39.5 × 36.2 × 1.6 mm and is certified to FCC, CE and CB standards. Compatible with Windows 11, it enables serial communication for legacy devices, industrial equipment or peripherals requiring RS-232.

## Long description

The Lenovo Internal COM Expansion Card adapter provides an RS-232 serial output via a BTB (board-to-board) host interface. This compact, green PCB module (39.5 × 36.2 × 1.6 mm) is intended for internal installation in compatible Lenovo Tiny systems and enables connection of legacy devices, industrial equipment or peripherals that require an RS-232 interface. The adapter is certified to FCC, CE and CB standards and is compatible with Windows 11.
Advantages
The adapter offers a straightforward RS-232 output through a male BTB host connector, occupying minimal space on the system board. Its compact dimensions and standardized certifications simplify integration into compatible Lenovo PCs while maintaining proper electrical and regulatory compliance for serial communication.
Suitable for
 Connecting legacy serial devices that use RS-232
 Industrial controllers and measurement equipment
 Peripherals requiring an internal serial port in Lenovo Tiny systems
 System integrators and technicians installing internal expansion modules
Key specifications
 Interface: RS-232 output via BTB (board-to-board) host interface
 Connector: male BTB host
 Dimensions: 39.5 × 36.2 × 1.6 mm
 Color: green (PCB)
 Compatibility: selected Lenovo Tiny PCs; Windows 11 supported
 Certifications: FCC, CE, CB
 Manufacturer part number (MPN): 4XH1K25073
 EAN: 0195892090182
How to use
Install the expansion card adapter on the designated BTB host connector inside a compatible Lenovo Tiny system following the PC manufacturer’s service instructions. Ensure the system is powered off and unplugged before installation. After physical installation, verify that the connection is secure and boot the system. Install or verify device drivers and configure the serial port parameters (baud rate, parity, data bits, stop bits) in the operating system to match the connected device.
Usage recommendations
Use this internal adapter only with supported Lenovo Tiny models and consult the system hardware manual for proper installation locations and handling. Avoid electrostatic discharge during handling and confirm RS-232 signal levels and grounding match the connected equipment.

## Specifications

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 0 - 90 |
| Operating temperature (T-T) | 0 - 50 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Host interface | BTB |
| Output interface | RS-232 |
| Host interface gender | Male |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.0164 kg |
| Package weight | 80 g |
| Height | 1.6 mm |
| Width | 39.5 mm |
| Depth | 36.2 mm |

### System requirements

| Feature | Value |
|---|---|
| Windows operating systems supported | Windows 11 |

### Design

| Feature | Value |
|---|---|
| Internal | Yes |
| Product colour | Green |
| Purpose | PC |

### Performance

| Feature | Value |
|---|---|
| Certification | FCC,CE,CB |
| Compatibility | ThinkCentre Tiny |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 136 mm |
| Package height | 36 mm |
| Package width | 132 mm |
| Package type | Box |

## FAQ

### How much does the Lenovo Internal COM Expansion Card — RS-232 adapter cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 31 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 17.07.2026 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 Lenovo 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 Lenovo 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: host interface, weight, internal, output interface, 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/11196115/61991771_large.webp