Product description Compatibility: This GPS antenna Compatible with the following ALPINE GPS units:INE-S920EINE-S920HDINE-W920RINE-W927HDINE-W928RINE-W940INE-W940EINE-W947EINE-W957HDINE-W960INE-W960AINE-W967HDINE-W987DINE-W990BTINE-W997DINE-Z928EINE-Z928HD Features: Brand New 3 Meters Amplified Remote GPS Antenna Active Gain for better signal Built-in Powerful Low Noise Amplifier Magnetic Base Specifications: Dielectric Antenna Center Frequency 1575.42MHz3 MHz V.S.W.R 1.5:1 Band Width 5 MHz Impendence 50 ohm Peak Gain >3dBic Based on 77cm ground plane Gain Coverage >-4dBic at 90
