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Cell Phone Signal Boosters, Stop dropped calls and improve text reliability and 3G 4G LTE data speeds. Verizon, AT & T, T-Mobile, Sprint, US Cellular with the SureCall Guardian3 QR

 Cellphone Signal Booster

Guardian3 QR

80 dB Public Safety Band Signal Booster

SC-TriPSBS-80-QR
Large Building Use
Public Safety
Industrial Use
Public Safety Band
Where To Buy?
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 Cellphone Signal Booster
US Based Customer Support
US-Based
Customer Support
Industry Leading 3 Year Warranty
3-Year Warranty
60 Day Money Back Guarantee
60-Day Money-
Back Guarantee
Boosts Cell Signal for All Carriers
Works with All Carriers
Long Term Reliability
Long-Term Reliability
FCC Approved
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 700 MHz (FirstNet Ready), 800 MHz, and 900 MHz SMR (Specialized Mobile Radio Service).

In the majority of cases, newly constructed buildings with considerable size, or existing buildings that increase capacity by expanding the building footprint 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 NFPA 1221 and IFC 510 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

  • 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 the code for NFPA 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. Activate your warranty at surecall.com/activate

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
WARNING: California’s Proposition 65
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Support Documents
This is NOT a CONSUMER device.
It is designated for installation by FCC LICENSEES and QUALIFIED INSTALLERS. You MUST have an FCC LICENSE or express consent of an FCC Licensee to operate this device. Unauthorized use may result in significant forfeiture penalties, including penalties in excess of $100,000 for each continuing violation.
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