PowerMax™ Marine & RV Cellular Booster 50dB Gain 3 Watt Dual Band Wireless Repeater System Get more bars with Digital Antennas PowerMax™ 4KMR-30M marine and RV wireless cell booster. Designed for boats with cabins and RVs, this new 50dB gain wireless cellular repeater system boosts the signal strength of your cell phone or air card to 3 watts and improves transmit and receive signals. The result is clean and clear voice quality with maximum data throughput on all carriers except Nextel or iDEN. Not for use in open console boats. DUAL BAND: FCC and IC approved for use with all North American cell phones operating on 850 or 1900 MHz (except Nextel or iDEN). Application: - Boats with cabins and RVs (not for use in open concole boats) Range/Performance: - Amplifies cellular signal up to 20+ mile* Advantage: - Wirelessly enchance multiple cell phones in one room 8" to 15" from inside antenna Requirement: - 12" separation plus a structure between inside and outside antennas * Increased range varies based upon height of outside antenna, type of cable used, cell phone carrier and location of cell tower. For maximum range, place outside antenna as high as possible using ultra low-loss cable. 4KMR-30M System Includes: 3 watt dual band 40dB gain cellular repeater (DA4000MR) * 18 external 9dB gain antenna ( 288-PW ) Internal 9 dB gain antenna ( 426-PW ) 30 of DA240 cable for external antenna ( 240-30NM ) 15" of DA240 cable for internal antenna ( 240-15NM ) 1"14 threaded mount ( DM194 ) 1"14 threaded mounting ferrule ( F114 ) 12 VDC power converter ( DP515 )