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Heng Yu is a Hong Kong based company, with a strong R&D center in our Hong Kong headquarter and powered by our own modern production campus in Zhuhai (Guangdong, China). The two offices are linked up together by the world’s largest and amazing bridge over the sea.

Get In Touch

Phone: +852 2394 1852
Address: Room 1503-05, NanFung Commercial Center, 19 Lam Lok Street, Kowloon Bay, HK

Our Location

852-2394 1852


The K104R-RF is a high quality and reliable hygiene full size keyboard, which is specifically designed for the use in hospitals and healthcare applications. The silicon membrane protects the key field against ingress of dirt and fluids. The K104R impresses with its low force key actuation and precise key guidance. It is highly recommended for heavy duty type writing in hygiene-critical environments, particularly for office and administration applications. Additional benefits are:

  • Thorough surface disinfection by spray/wipe sanitizing on flat keyboard skin without edges and seams. 
  • Clean Function allows for disabling the keyboard during cleaning (“Fn”+”Clean”). 
  • Suitable for most common hospital disinfecting solutions
  • Replaceable keyboard skin for clinic disinfection by steam pressure processing
  • Touch proof disinfection of the surface of the keyboard body by spray/wipe sanitization
  • Surface disinfection instead of invasive submersion cleaning:
    • Avoids outer and inner re-contamination by polluted suds
    • No risk of germ transmission by fluids leaking or dripping off the product
    • No contact with hollow spaces


Important Features

  • Disinfectable 2.4GHz Wireless Hygiene PC-Keyboard with Clean Function, 
  • German layout,
  • With 105 keys and “Clean function”, 
  • USB interface, 
  • White color housing,
  • One white replaceable Rubber Keyskin with printing “Clean” at right Shift key in square box,
  • Product Size: 451.4 x 146.4 x 31.2 mm.
  • IP68 & Battery Replaceable

Technical Data


– Power Supply: “AAA” x 4

– Input Voltage Range:  6V

– Current Consumption: 

  • 20mA @Key pressing (Normal operation)
  • 50uA @idle mode
  • 50uA @RF suspend (Deep sleep mode)


– Number of Keys: 105

– Key strokes life: 1 million

Wireless Spec

– 2.4GHz

– FCC and CE compliant


– Storage temperature: -10°C to +55°C

– Operating temperature: -40°C to +85°C

– Operating humidity: 10 to 90%

– IP68 compliant 

– Battery Replaceable: 

  • Twist and pull the battery cover on side
  • Replace the battery
  • Twist and lock battery cover on side again
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