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  Netvox R831B-Wireless Multifunctional Control Box

  R831B is a device used to control the switch and is mainly used for the
  switch control of the light electric motor control box.

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  Netvox R831A-Wireless Multifunctional Control Box

  R831A is a device used to control the switch and is mainly used for the
  switch control of the strong electric motor control box.

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  Netvox R831D-Wireless Multifunctional Control Box

  R831D have three relay switches(output) and three dry contacts(input).
  R831D can report status of 3 dry contacts individually and control 3 relays

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  Netvox R831C-Wireless Multifunctional Control Box

  R831C have three relay switches(output) and three dry contacts(input).
  R831C can control 3 relay devices through external dry contact button or downlink commands.

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