DescriptionHuidu A5L Function Parameters Wi-Fi antenna Connect Wi-Fi antenna to enhance wireless signal Sensor External temperature, humidity, brightness, wind speed, wind direction, noise, PM2.5, PM10, CO₂ and other sensors 4G/5G antenna Connect 4G/5G antenna (4G with 1 antenna, 5G with 4 antennas, optional) Power supply 5V 3A ,12V 1.5A Input network port Gigabit input network port, connect to computer to debug and release programs, can be used to access LAN or Internet Reset Reset pinhole Audio output TRS 3.5mm standard two-channel audio output port HDMI HDMI IN：HDMI1.4 synchronous signal input interface, support adaptive scaling OTG：Used for debugging or upgrading firmware (default USB 2.0 function, factory configurable) Output network port Gigabit output network port, cascaded with HD-R series receiving card Ground wire Ground wire connection port