Premiertek PL-SA8519 850/1900MHz Dual Band Cellular Signal Amplifier Kit for Home and Office- Non-Retail Packaging - Black/Beige Amplifier Specifications: Frequency 824-894 MHz / 1850-1990 MHz Gain Uplink: 60 dB / Downlink: 65 dB Complete kit Greatly reduces dropped calls, extends signal range, and increases data rates Reduce radiation to human body and brain from cell phone Extend cell phone battery lifespan Works on all generations of CDMA, TDMA, GSM, and 3G Networks Oscillation (or interference) detection and automatic shutdown with auto reset Overload protection circuit -protects cell towers from being overloaded Amplifies signals both to and from the cell tower Professional installation required Kit Contents: 8.5dBi Yagi Antenna (Outdoor) 5dBi Ceiling Antenna (Indoor) Dual Band Amplifier 15 Meter N-M to N-M RG-6 Cable (Indoor) 5 Meter N-M to N-M RG-6 Cable (from Outdoor to Indoor)