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Sommer 4020 remote transmitter 4-channel, 868 MHzSommer 4020 remote transmitter 4-channel, 868 MHz
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Sommer 4020 remote transmitter 4-channel, 868 MHz

CODE: 4020V000

Price: 30.75 

(25.00  without tax)

High Transmission Reliability

  • Only approved for radio applications with a "Very Low Duty Cycle < 0.1 %". Transmissions on FM 868.8 MHz frequency must be short which means that "Long-term transmitters" such as radio headphones or baby monitors are not allowed on this frequency, preventing noise  
  • Frequency Modulation (FM) further increases the transmission reliability
  • Generally, no visible antennas are necessary to gain signal strength 
  • Excellent selectivity; the receiver can clearly distinguish "its own" transmitter's radio signal from other radio signals, and receives the signal reliably.

Extremely safe Somloq Rollingcode system

  • Safe from "code scanning" (a code length of 66 bits gives 74 trillion possible combinations. Scanning would take approx. 234 billion years)
  • Safe from "code grabbing" (bug-proof)
  • The code changes every time it is activated (Somloq Rollingcode system). Transmitting a recorded code would therefore be ineffective
  • Safe from use by unauthorised persons


  • Only high-quality components are used
  • Consistently high quality, even over a long service life (for example, fluctuations in temperature or vibrations have no effect)

Many applications

Whether for indoor or outdoor use, SOMMER radio technology is ideal for a wide range of applications, such as:

  • All types of operators (e.g. for garage, swing and sliding doors/gates)
  • Door openers
  • Roller shutters and blinds
  • Lighting (indoor and outdoor)
  • Alarm systems
  • Fountains
  • and many more.

An extra bonus: its simple, fast and economical installation. No laborious and expensive laying of cables required ? saving time and money!

Low energy consumption

  • Thanks to the antenna's superior efficiency, longer battery life (standard, flat lithium button cell CR 2032) at same range (approx. 50 m, depending on surroundings).

Definite identification of the transmitter - teach-in via radio

  • Each transmitter has its own, unique serial number
  • Each receiver can store 112 different codes; each button of the transmitter has its own code
  • Because each transmitter has a unique serial number, an individual transmitter code can be deleted on the receiver without affecting other transmitters.

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