Police and Fire Departments, Hospitals and other First Responders</br>Built-in safeguards eliminate interference to public safety network</br>Independently configurable for each band - Area up to 80,000 sq. ft.</br>Frequency: Uplink: 788-805 / 806-824 / 896-901 Mhz; Downlink : 758-775 / 851-869 / 935-940 Mhz - Gain Up to 80 dB Gain</br>3 year warranty and support from SureCall</br></br>Product Description</br></br>SureCall's latest innovation, the Guardian3, is a tri-band, bi-directional amplifier (BDA) that services the 700 MHz and 800 MHz Public Safety bands as well as the 900 MHz SMR (Specialized Mobile Radio Service). Guardian3 is an extremely affordable solution to provide public safety coverage in buildings with weak signal strength. WARNING. This is NOT a CONSUMER device. It is designed 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 dollar100,000 for each continuing violation.</br><br/>http://www.amazon.com/gp/product/B014V7RQZE