Lenovo USB Numeric Keypad Gen II
PRODUCT DESCRIPTION
Lenovo USB Numeric Keypad Gen II (4Y40R38905) - 1 Year Warranty, Singapore Local Warranty
A Full Number Pad for Your Laptop
The Lenovo USB Numeric Keypad Gen II adds a dedicated 19-key number pad to laptops and compact keyboards — ideal for accounting, data entry and spreadsheet work.
Handy Extra Keys
Dedicated Tab, Backspace and 00 keys speed up numeric entry, and an isolated LED-illuminated NumLock key shows the mode at a glance.
Plug and Play
Connect the 1 m USB cable and it is ready to use within seconds — no batteries, no pairing and no software required.
Compact and Durable
At just 157 x 96 x 24 mm and from 135 g, it slips into a laptop bag, and its keys are rated for up to 10 million clicks.
Lenovo USB Numeric Keypad Gen II Datasheet — Technical Specifications
General
| Product | Lenovo USB Numeric Keypad Gen II |
| Part Number | 4Y40R38905 |
| Product Type | Wired USB numeric keypad |
| Manufacturer Warranty | 1 year |
| Local Warranty (Singapore) | Included with every SourceIT purchase, with GST invoice |
Keys
| Number of Keys | 19 |
| Special Keys | Tab, Backspace, 00; isolated LED-illuminated NumLock key |
| Key Life | Up to 10 million clicks |
Connectivity & Power
| Interface | Wired USB |
| Cable Length | 1 m |
| Power Rating | 5 V, 30 mA |
Physical
| Dimensions | 157 x 96 x 24 mm (6.18 x 3.78 x 0.94 in) |
| Weight | From 135 g (0.3 lb) |
| Colour | Black |
Compatibility
| Operating Systems (per Lenovo) | Windows 10, Windows 7 |
Compatibility & Fit
USB-A Connection
The keypad uses a fixed USB cable with a USB-A plug. USB-C-only laptops need a USB-C hub, dock or adapter with a USB-A port.
Wired vs Wireless
Prefer no cable? The rechargeable Lenovo Go Wireless Numeric Keypad (4Y41C33791) connects over 2.4 GHz wireless instead.
Operating Systems
Lenovo lists Windows 10 and Windows 7. As a standard USB keypad it generally works with newer Windows versions too; confirm with SmartFind if you have a specific requirement.
Package Contents & Lenovo Ordering Information
In the box:
- Lenovo USB Numeric Keypad Gen II
- Setup and information poster
Lenovo Numeric Keypads Ordering Information
| 4Y41C33791 | Lenovo Go Wireless Numeric Keypad (rechargeable, 2.4 GHz) |
| 4Y40R38905 (this listing) | Lenovo USB Numeric Keypad Gen II (wired USB) |
Datasheet & Downloads
- Lenovo Support — USB Numeric Keypad Gen II overview
- Lenovo Accessories SmartFind — compatibility checker
Use Lenovo SmartFind to confirm compatibility with your PC, and Lenovo Support for manuals and any software updates.
Frequently Asked Questions — Lenovo USB Numeric Keypad Gen II
Do I need to install drivers?
No. It is plug and play — connect the USB cable and it is ready within seconds.
How many keys does it have?
19 keys, including dedicated Tab, Backspace and 00 keys and an LED-illuminated NumLock key.
How long is the cable?
1 m.
Does it need batteries?
No. It is powered by the USB connection.
