# Lenovo 4X31K03931 Keyboard Mouse included RF Wireless + Bluetooth US English Black

**URL:** https://aio.lv/en/product--lenovo-4x31k03931--11423728
**Data updated:** 2025-12-30 21:18 (EET)
**Category:** Keyboards
**Manufacturer:** Lenovo
**Manufacturer code:** 4X31K03931
**EAN:** 195892062448
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 141.99 €
**Prices and availability valid until:** 2026-07-30 23:59
**Price without VAT (21%):** 117.35 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lenovo-4x31k03931--11423728

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Lenovo 4X31K03931 is a full-size wireless keyboard that features both RF Wireless and Bluetooth connectivity. It includes a mouse and is designed for comfortable typing with scissor key switches. The sleek black finish adds a modern touch to any workspace.

## Long description

The Lenovo 4X31K03931 Keyboard and Mouse combo offers a full-size wireless keyboard with dual RF Wireless and Bluetooth connectivity and an included wireless mouse. The keyboard uses scissor key switches for a responsive typing feel and is finished in black to suit modern workspaces. Both devices are made with approximately 65% recycled material and the mouse features a high-precision 4,000 DPI sensor and an ergonomic bio-rubber body.
Advantages
The combo provides flexible connectivity with RF Wireless and Bluetooth options, a full-size layout for familiar key placement, and scissor switches for improved key stability and typing comfort. The included mouse delivers precise tracking at up to 4,000 DPI and an ergonomic grip thanks to its bio-rubber construction. Using recycled materials reduces environmental impact.
Suitable for
Office and home productivity tasks
Remote work and multi-device setups (Bluetooth + RF)
General desktop use and data entry
Users who prefer a full-size US English keyboard layout
Key specifications
Device interface: RF Wireless + Bluetooth
Keyboard form factor: Full-size (100%)
Keyboard language: US English
Mouse included: Yes
Product colour: Black
Mouse sensor: up to 4,000 DPI
Materials: ~65% recycled material; mouse body made from bio-rubber
How to use
Connect the keyboard and mouse via RF Wireless using the provided USB receiver or pair each device with a computer or tablet over Bluetooth. Place the keyboard on a flat surface at a comfortable distance and rest your wrists lightly while typing to maintain ergonomic posture. Use the mouse on a stable surface for accurate tracking; adjust pointer speed in the operating system settings if needed.
Usage recommendations
For best battery life and stable operation, keep the keyboard and mouse within the recommended wireless range of the host device, avoid excessive liquid exposure, and pair via RF for minimal latency when performing precision tasks.

## Specifications

### Keyboard

| Feature | Value |
|---|---|
| Device interface | RF Wireless + Bluetooth |
| Keyboard form factor | Full-size (100%) |
| Certification | CE
CB
BQB
TUV Mark
cTUVus
FCC
IC
IDA
WPC
BIS
SIRIM
NTA
SDOCo
SDPPI
NTC
MIC
AITI
RCM
NCC
BSMI
MSIP
VCCI
JRF
SRRC
ANRCETI
ICASA
MINCOM
STA
MoC
UkrSEPRO
ACI
FAC
TRA
NTRA
TRC
MOC
ICT
INACOM
NCC
ANRT
CERT
CNC/AFTIC
ANATEL
SUBTEL
IFETEL
TUV NOM |
| Keyboard language | US English |
| Pointing device | No |
| Windows keys | Yes |
| Numeric keypad | Yes |
| Connectivity technology | Wireless |
| Multimedia keys | Yes |
| Keyboard key switch | Scissor key switch |
| Keyboard keys operating life | 10 million characters |
| Multi-device support | Yes |

### Mouse

| Feature | Value |
|---|---|
| Mouse included | Yes |
| Button functions | DPI switch, Forward |
| Buttons quantity | 8 |
| Movement detection technology | Optical |
| Movement resolution | 4000 DPI |
| Scroll | Yes |
| Scroll type | Wheel |
| Buttons type | Pressed buttons |
| Mouse cable length | 1 m |
| Form factor | Ambidextrous |
| Mouse battery type | Built-in battery |
| Mouse battery life | 3 month(s) |
| Mouse on/off switch | Yes |

### Design

| Feature | Value |
|---|---|
| Product colour | Black |
| Backlight | No |
| Adjustable keyboard height | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Mouse dimensions (WxDxH) | 111.3 x 62.2 x 36.1 |
| Mouse weight | 80 g |
| Keyboard dimensions (WxDxH) | 437.4 x 128.8 x 14.8 |
| Keyboard weight | 586 g |

### Power

| Feature | Value |
|---|---|
| Battery life (max) | 2 h |
| Power source type | Battery |
| Keyboard battery type | Built-in battery |
| Service life of battery | 3 month(s) |
| Charging source | USB Type-C |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 20 - 95 |
| Operating temperature (T-T) | 0 - 40 |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 885 g |
| Package depth | 129 mm |
| Package height | 42 mm |
| Package width | 538 mm |
| Package type | Box |

### Packaging content

| Feature | Value |
|---|---|
| Manual | Yes |
| Warranty card | Yes |
| Number of products included | 2 pc(s) |
| Wireless receiver interface | USB Type-A |
| Receiver included | Yes |

### Battery

| Feature | Value |
|---|---|
| Battery technology | Lithium |
| Battery capacity | 420 mAh |

## FAQ

### How much does the Keyboard Lenovo 4X31K03931 cost, and is it available for purchase?

The price is 141.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 14.07.2026 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 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: device interface, keyboard form factor, mouse included, keyboard language, 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/11423728/66178350_large.webp