Free shipping over $99. Easy returns. Satisfaction guaranteed.


by: Cel-Fi


by: Cel-Fi


The manufacturer of this product does not allow it to be sold online.

Please contact us by calling 800-761-3041 or using this form if you're interested in purchasing this unit.

Contact us to purchase
Free, fast shipping
90-Day Money-Back Guarantee
Unlimited free expert support
Carbon neutral deliveries


SHIELD EXTEND revolutionizes what it takes to install an emergency responder communication enhancement system (ERCES), making it quicker and less costly than ever before. With its advanced automation features, businesses can get a system installed, receive Authorities Having Jurisdiction (AHJ) approval, attain their CoO, open their doors, and start making money faster than with any other solution.

  • Class A and Class B configuration flexibility
  • Reliable coverage for LMR 700/800 MHz and channelized FirstNet Band 14
  • Scalable Power-over-Ethernet (PoE) architecture to support enterprise environments
  • Nextivity proprietary IntelliBoost software provides automatic calculation of system parameters (no manual testing required!)
  • Built-in, end-to-end remote system monitoring and management via Nextivity WAVE Portal
  • Fiber expansion capabilities for campuses, multi-building facilities, and high-rises

Removing the Guesswork

IntelliBoost software inside SHIELD public safety solutions enables them to automate system parameters that no other ERCES can do. By automatically calculating and setting system parameters, SHIELD EXTEND allows installers to deploy an ERCES faster and with more confidence it will pass the first AHJ inspection than with other solutions.

  • Real-time monitoring of environmental changes and automatic adjustments (if necessary) to ensure consistent, reliable performance
  • Automatic setting/optimization of uplink (UL) gain (no additional testing equipment or calculation guessing)
  • Automatic calculation of path loss, allowing for different values according to network requirements
  • Isolation calculated in real-time and automatically set at 20 dB per NFPA 1221 (the system also allows for different values according to local ordinances)
  • Downlink (DL) gain automatically adjusted to achieve required value

System Components

Management Unit

Model Number: F40-0E

The management Unit (MU) is the central point of the system. In addition to accepting and distributing power from the SHIELD EXTEND Battery Backup Unit (BBU), the MU controls and monitors all system components, including the Network Unit (NU), Coverage Unit (CU), and accessory components. System performance analytics are available in the Nextivity WAVE Portal or WAVE PRO app.

Network Unit

Model Number (Class A): F42-67ENU
Model Number (Class B): F42-67ENUB

With its two donor ports, the NU processes and digitizes the off-air LMR and FirstNet donor signals and distributes those signals to the CUs. Each NU can support and power up to six CUs via PoE.

Coverage Unit

Model Number (Class A): F41-8XCU
Model Number (Class B): F41-8XCUB

The CUs rebroadcast LMR and FirstNet donor signals to local service antennas throughout the facility. They are self-configuring and self-optimizing, enabling faster system deployment and certification.

SHIELD EXTEND Battery Backup Unit

Model Number: F43-00

The Battery Backup Unit (BBU) provides constant direct current and battery charging capabilities for SHIELD EXTEND systems. In the event of a power failure, the BBU allows SHIELD EXTEND to maintain peak operation for up to 12 hours. In addition to being NEMA 4 rated and listed to UL 2524, the BBU supports four 12-volt lead-acid batteries and includes accessories for wall mounting and cabling for connecting to the MU.

SHIELD EXTEND Fiber Range Extender (Optional)

Model Number (NU Side): F40-0XNU
Model Number (CU Side): F40-0XCU

Ideal for campuses, multi-building facilities, and high-rises, the SHIELD EXTEND Fiber Range Extenders (FRE) increase the distance between the SHIELD EXTEND NU and CU up to nearly one mile. In addition to supporting copper cable to power up CUs remotely, FREs work in pairs and are sold as a kit that includes two units—one NU side and one CU side—with each pair supporting up to two CUs.


Cel-Fi warranties the GO X for 2 years, and Waveform warranties all of our antennas and RF components for 3 years.

Read more about Cel-Fi and Waveform's warranty policies here.

Specifications, Guides, and Downloads

FCC notice
Read full notice Collapse notice
This is a CONSUMER device. BEFORE USE, you MUST REGISTER THIS DEVICE with your wireless provider and have your provider's consent. Most wireless providers consent to the use of signal boosters. Some providers may not consent to the use of this device on their network. If you are unsure, contact your provider. You MUST operate this device with approved antennas and cables as specified by the manufacturer. Antennas MUST be installed at least 20 cm (8 inches) from any person. You MUST cease operating this device immediately if requested by the FCC or a licensed wireless service provider. WARNING. E911 location information may not be provided or may be inaccurate for calls served by using this device. Please note, the four largest carriers - AT&T, T-Mobile, Verizon and Sprint - and more than 90 regional carriers have given blanket consent for use of all boosters certified to the new FCC standards.
CA Prop 65 Warning
Read full warning Collapse warning
This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer, and Bisphenol A, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to

Customer Reviews

0.0 out of 5 stars
(0 Reviews)

Customers Also Bought

90 Day Satisfaction Guarantee

We stand behind the products we sell. We’ll accept a return anytime within 90 days if you’re not happy with your purchase from us.

Free & Fast Shipping

Any order over $99 ships free. And we get packages out the door quickly: 82% of orders are shipped within 24 working hours.

Large Building? We Can Help

Our signal experts have helped design and install kits in buildings of over 200,000 sq ft. Let us help you find the right product.

Looking for personalized recommendations?
Our signal specialists are here to assist.