Cellphone-Mate CM230-1900 Outdoor 1850-1990Mhz Directional Yagi Antenna Brand New Cellphone-Mate Outdoor 1850-1990Mhz Directional Yagi Antenna (CM230-1900). Directional antenna that collects cell tower signals and sends them through a cable to an amplifier or directly to a cell phone or cellular device card. The CM230-800 is for the 1900MHz band range (1850-1990 MHz). Designed for fixed installations. Gain: 14dBi