1.The power amplifier uses domestic core key components and can operate normally at low temperatures of -40°C. 2.This document stipulates the radio frequency and monitoring technical indicators of the 433mhz 20W power amplifier module, the definition of each port of the module, the appearance and structure of the module, etc. 3.This document applies to all aspects of product design, verification, production and quality inspection of the 433mhz 20W power amplifier module.