Guardian3 QR

80 dB Public Safety Band Signal Booster

Industrial Use
Public Safety Band
Up to 80,000 sq ft
100+ simultaneous users
US-Based Customer Support
3-Year Warranty
60-Day Money-Back Guarantee
Works with All Carriers
Long-Term Reliability
FCC Approved

SureCall’s Guardian3™ QR Public Safety Band signal booster amplifies FirstNet signals for crucial communications, delivering consistent signal for First Responders and other public safety officials relying on two-way radio communication inside large buildings.

Guardian3 QR (Quick Response Unit) is equipped with a tri-band booster that has a maximum gain of 80 dB on the Public Safety frequency bands, supporting 100+ simultaneous users per band on 700 MHz (FirstNet Ready), 800 MHz, and 900 MHz SMR (Specialized Mobile Radio Service).

In the majority of cases, newly constructed buildings with an area of at least 10,000 square feet per floor, and at least three floors high 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. Guardian3 QR meets the code for Chapter 24 Emergency Communications System of NFPA72 and features a NEMA-4 rated amplifier housing, which eliminates the need for an additional NEMA enclosure.

Additionally, the Guardian3 QR comes equipped with dry contact 7-pin alarming capability, UPS and Ethernet port enabled remote monitoring. The Guardian3 QR amplifier features sturdy metal construction and is covered by an industry leading 3-year warranty.


  • Provides improved coverage for Public Safety 700 MHz (FirstNet), 800 MHz and 900 MHz (SMR)
  • 80 dB gain for Public Safety Bands

  • Linear design increases number of simultaneous users to 100+ per band

  • Features built-in SureCall Sentry remote monitoring with ethernet port

  • Integrated 7-pin alarm and UPS port for external battery backup
  • NEMA 4 rated amplifier housing. No additional NEMA enclosure(s) needed
  • Meets Chapter 24 Emergency Communications System of NFPA 72, 1221 and IFC 510

  • Dry contact 7-pin alarm, UPS and Ethernet port for remote monitoring

  • Energy-saving operation allows bands to remain dormant when not in use

  • Automatic gain control (AGC)

  • A/C 110V or D/C 16-24V power option

  • Independently adjustable frequency attenuation for uplink and downlink (Reduce gain in -1 dBm increments)

  • Industry leading 3-year warranty, 5-year extended warranty available

Product Specifications

Uplink Frequency Range (MHz): 788-805 / 806-824 / 896-901 (Including D Block)
Downlink Frequency Range (MHz): 758-775 / 851-869 / 935-940 (Including D Block)
Supported Standards: Public Safety 700 (FirstNet), 800 and SMR 900
Input/Output Impedance: 50 Ohm
Maximum Gain: 80 dB
Gain Adjustment: 31 dB
Maximum RF Output Power: 26 dBm
Noise Figure: ≤ 8 dB
VSWR: ≤2.0
Power Input: D/C 16/24v or A/C 110 V, 60 Hz
P1dB: 31.5 dBm
Cable: SC-400
RF Connectors: N Female (both ends)
Power Consumption: 50W
Operating Temperature: -4ºF to +131ºF
Dimensions: 21.5″ x 17″ x 6″
Weight: 49.6 lbs

Support Documents

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