One of the most powerful amplifiers on the market with the best warranty (24 months). Cellphone Mate CM2020 Dual Band Universal In-building Amplifier/Repeater. The CM2020 is a high gain 68dB dual band repeater that extends cellular services in poor coverage areas by amplifying both transmit and receive signals. The amplifiers reduce problems with signal fades and dropped calls while improving voice quality, service range and access. These multi-mode amplifiers are designed to offer a cost-effective solution for use in buildings. Cellphone-Mate amplifiers are network compatible and enhance the cellular phone user's satisfaction without compromising the operation of the cellular system. This Amplifier-Repeater greatly improves signal strength inside a building when using your cellular phone. It does this without a physical connection to your phone, allowing you to walk freely during a call. It even allows multiple phones to be used simultaneously. The signal from the cellular tower is received by the outside antenna and then amplified and repeated to your phone through the inside antenna. When the phone transmits, it is received by the inside antenna and then amplified/repeated through the outside antenna to the cellular tower. The higher gain of the CM2020 repeater allows it to provide greater coverage area and more easily drive multiple interior antennas. Repeater includes AC power supply and mounting bracket. Features: * 68dB Reconfigurable, dual band, fit different sized buildings * Automatic Level control (ALC) to help prevent overload * Uplink/Downlink oscillation detection (individual LEDs) * Wireless operation - no physical connection to cellular phone * 3 Watts Output Power when used with recommended 9dB or higher gain exterior antenna * Compatible with all Cellular/PCS Carriers and technology (GSM/GPRS, CDMA, TDMA, APMS/Analog) except iDEN (Nextel, Southern LINC, Mike) and 1700MHz Aws (T-Mobile US 3G) * Allows multiple phones to be used simultaneously * 2 year manufacturer warranty When designing your system, please be sure to allow for 70' of separation between the interior and exterior antennas (20' which must be vertical). Important Information Regarding Coverage: * Coverage is dependent upon the strength of the signal received from the tower at the outside antenna. At the location that the outside antenna is mounted a signal strength of at least 3 bars is required. Use of a high-gain directional antenna for the outside antenna improves coverage area. Requires: * Outside antenna (recommend Yagi) * Inside antenna (recommend Ceiling Mount Dome Antenna) * Ultra Low Loss Cable Optional: * Splitters * Lightning Protector * Test Cable/Adapter to aim Yagi (highly recommended!) Compatibility: * Compatible with all Cellular/PCS Carriers and technology (GSM/GPRS, CDMA, TDMA, AMPS/Analog) * Not compatible with iDEN (Nextel, Southern LINC, Mike) * Not compatible with 1700MHz AWS (T-Mobile, US 3G, Mobilicity, Wind,)