Microphones with 100mm Leads PUI Audio Microphones with 100mm Lead Wires are designed to make product prototyping, PCB design and layout, and assembly faster. These microphones indicate polarity by color on the halogen-free UL 3302 32AWG wire, virtually eliminating accidental reverse polarity connections. PUI Audio Microphones with 100mm Leads are based on popular 4mm, 6mm, and 9mm models that were previously only offered with solder pads.