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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 Guardian4

 Cellphone Signal Booster


Best Value and Reliability for Class B ½ watt Public Safety Building Regulations

Industrial Use
Public Safety Band
Public Safety
Sentry Remote Monitor
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 Cellphone Signal Booster
US Based Customer Support
Customer Support
Industry Leading 3 Year Warranty
3-Year Warranty
30 Day Money Back Guarantee
30-Day Money-
Back Guarantee
Boosts Cell Signal for All Carriers
Boosts 700 MHz & 800 MHz
Long Term Reliability
Long-Term Reliability
FCC Approved
FCC Approved

SureCall's Guardian4™ Public Safety Band signal booster amplifies FirstNet signals for crucial communications, delivering consistent signal for First Responders and other public safety officials who rely on two-way radio communication inside large buildings.

Guardian4 is equipped with a dual-band booster that has a maximum gain of 80 dB on the Public Safety frequency bands, supporting 700 MHz (FirstNet Ready) and 800 MHz.

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.

Guardian4 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, Guardian4 comes equipped with dry contact 7-pin alarming capability, UPS and Ethernet port enabled remote monitoring. The Guardian4 BDA amplifier features sturdy metal construction and is covered by an industry leading 3-year warranty.

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

  • Features built-in SureCall Sentry™ remote monitoring hardware 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 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 12-20V 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

Product Specifications
Uplink Frequency Range (MHz): 788-805 / 806-816
Downlink Frequency Range (MHz): 758-775 / 851-861
Supported Standards: Public Safety 700 MHz (FirstNet) & 800 MHz
Input/Output Impedance: 50 Ohm
Maximum Gain: 80 dB
Gain Adjustment: 31 dB
Maximum RF Output Power: +27 dBm (DL), +26 dBm (UL)
Noise Figure: ≤ 5 dB
VSWR: ≤2.0
Power Input: DC 12- 20V; AC 110V; 60 Hz
P1dB: 31.5 dBm
Propagation Delay: 0.03 Microseconds
Cable: SC-400
RF Connectors: N-Female (both ends)
Power Consumption: 35W
Operating Temperature: -4ºF to +131ºF
Dimensions: 25" x 19" x 9"
Weight: 54 lbs
FCC Certification: FCC Part 90
UL Certification: UL 60950-1
WARNING: California’s Proposition 65
WARNING: Cancer and Reproductive Harm -
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.