The AV-LEADER PA331 is a conference microphone featuring a back electret condenser element with an omnidirectional polar pattern. It offers a frequency response range of 50~18,000Hz and a sensitivity of -65dB±3dB. With 1,000Ω impedance, it connects via a 3.5mm female jack and operates on a single 1.5V DC LR44 battery. The microphone includes a sliding switch with On/Standby/Off positions. Constructed with a zinc die-cast base, the PA331 measures 8×80×262mm and weighs 249g. This compact conference microphone is designed for speech applications in meeting environments requiring reliable audio pickup without phantom power requirements.