Lenovo 40K9439 keyboard Universal PS/2 Danish Black vs Lenovo Preferred Pro

Comparison of 40K9439, Preferred Pro

32 specifications	A Lenovo 40K9439 keyboard Universal PS/2 Danish Black Model 40K9439 View product	B Lenovo Preferred ProView product
Keyboard1 differ
Recommended usage	Universal	Universal
Connectivity technology	Wired	Wired
Device interface	PS/2	PS/2
Keyboard languageDiffers	Danish	US English
Pointing device	No	No
Keyboard form factor	Full-size (100%)	Full-size (100%)
Numeric keypad	Yes	Yes
PurposeKnown for one	—Unknown — not stated by the source	Universal
Fingerprint readerKnown for one	—Unknown — not stated by the source	No
Smart card readerKnown for one	—Unknown — not stated by the source	No
Magnetic card readerKnown for one	—Unknown — not stated by the source	No
Hand cooling fanKnown for one	—Unknown — not stated by the source	No
CalculatorKnown for one	—Unknown — not stated by the source	No
Keyboard number of keysKnown for one	104	—Unknown — not stated by the source
Windows keysKnown for one	Yes	—Unknown — not stated by the source
CertificationKnown for one	FCC Part 15, Class B, UL 1950 (E164844), CSA C22.2 #0950-M89 (LR94275), Canada ICES-003 Class B; Canada NMB-003, Class B), CE (IEC 950, IEC 801-2, Level 3), TUV-GS ZH1/618 (R9552884), VCCI, C-Tick, MOC, BSMI, MIC, NOM	—Unknown — not stated by the source
Designidentical
Backlight	No	No
Keyboard style	Straight	Straight
Wrist rest	Yes	Yes
Product colour	Black	Black
Built-in displayKnown for one	—Unknown — not stated by the source	No
LED indicatorsKnown for one	Yes	—Unknown — not stated by the source
Featuresidentical
Plug and PlayKnown for one	—Unknown — not stated by the source	Yes
Cable lengthKnown for one	2 m	—Unknown — not stated by the source
Poweridentical
Power source type	PS/2	PS/2
Mouseidentical
Mouse includedKnown for one	—Unknown — not stated by the source	No
System requirementsidentical
Windows operating systems supported	Yes	Yes
Other featuresidentical
InternalKnown for one	—Unknown — not stated by the source	No
Operational conditionsidentical
Operating temperature (T-T)Known for one	10 - 40 °C	—Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	8 - 80%	—Unknown — not stated by the source
Weight & dimensionsidentical
Keyboard dimensions (WxDxH)Known for one	453 x 185 x 34 mm	—Unknown — not stated by the source
Packaging contentidentical
Number of products includedKnown for one	1 pc(s)	—Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.