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AF-21 Alarm Follow Message Center 


A new generation of IoT Cloud Access-automation-security message transmission center

When the monitored security device is abnormal, or the monitored patient moves or seeks help, or the service bell needs to forward service message to the mobile phone...
AF-21 is your message center.
It immediately sends an alert message to nearby pagers and sends the message to mobile phones on the earth.

You can send short messages to the smart phones, pagers, LED sign board, and PC.. 

without paying telecommunication charges.

"No need to install GSM card inside"

Main Features :

-   MQTT agreement

-  Remote configuration and monitoring via MQTT service

-  Forward message from pager to smart phone

-  8 independent dry alarm inputs

-  Wi-Fi module inside

-  LAN RJ-45 inside

-  POCSAG transmitter inside

-  POCSAG receiver inside

-  POCSAG Pager Standard

-  Pager Frequency Ranges:

-  From 138 to 930 MHz

-  Easy to system Programming

-  East to APPs set-up

-  In-field firmware upgrade via USB

-  Compact Size:W168/D80/H32 mm.

Application :

  • Alarm equipment monitoring
  • Door and window monitoring
  • Home Factory security
  • Aged parent calling the smartphone of children who are not around
  • Telemetry 
  • Pager transmitter/receiver
  • Alert log report by RS-232 RS485
  • Fire alarm receiver SMS forward
  • Replace service pager with smartphone
  • FCC and CE certification.

              For  Android and IOS  




                                         The screen of the mobile phone receiving the alert message        


Programming screen


Wireless Devices Inc. Taiwan.

Sales Department. e-mail:

Tel.(8862) 8502 0001