SureCall Guardian4

by SureCall

80 dB Public Safety bi-directional amplifier


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Product Description

The SureCall Guardian4 is a Public Safety Bi-Directional Amplifier for First Responders.

The Guardian4 amplifies FirstNet signals for vital communications. It provides consistent, reliable signal coverage for First Responders and other public safety officials who need two-way radio communication inside large buildings.

The Guardian4 has a maximum gain of 80 dB on the Public Safety frequency bands, supporting 700 MHz (FirstNet Ready) and 800 MHz. This is a slightly narrower frequency range than SureCall's other Public Safety amplifier, the Guardian3 QR. This narrower range means that the Guardian4 does not bleed into the cellular band, eliminating any risk of co-channel interference.

Most newly constructed large buildings, or existing buildings which have expanded, are required to have signal strength of -95 dBm or better in designated critical areas – elevators, stairwells, etc. – in order to receive a certificate of occupancy. The SureCall Guardian4 meets the code for NFPA 1221 and IFC 510.

It features a NEMA-4 rated amplifier housing, which eliminates the need for an additional NEMA enclosure. Additionally, the Guardian4 comes equipped with dry contact 7-pin alarming capability, UPS and Ethernet port enabled remote monitoring.

The Guardian4 comes with SureCall's 3-year warranty. A 5-year warranty is also available.

Please note that the SureCall Guardian4 was previously known as the SureCall Responder.


  • Provides improved coverage for Public Safety 700 MHz (FirstNet Ready) and
  • 800 MHz bands 
  • 80 dB gain for Public Safety Bands
  • NEMA-4 watertight enclosure. No additional NEMA enclosure(s) needed.
  • Integrated dry contact 7-pin alarm and UPS port for external battery backup
  • Built-in SureCall Sentry remote monitoring system with ethernet port
  • Meets the code for NFPA 1221 and IFC 510
  • Energy saving uplink becomes dormant when not in use, providing power-saving operation
  • Independently adjustable frequency attenuation for uplink and downlink. Reduce gain in -1 dBm increments
  • Auto Gain Control (AGC)
  • Quality metal construction, durable and resilient
  • A/C 110V or D/C 16-24V power option


SKU SC-Responder

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