1. Signal Reception and Amplification: A high-gain antenna precisely captures weak signals from the base station; the main unit performs rapid filtering and power amplification, while the indoor antenna provides directional transmission, resulting in stable signal enhancement.
2. Signal Relaying: Functioning essentially as a "signal relay station," it overcomes signal obstruction caused by buildings, facilitating smoother communication between mobile phones and the base station.
3. Power Control: High-quality devices feature automatic gain control technology (such as patented ALC/AGC); output power is strictly limited to within 200mW to prevent interference with the base station.