Impact MC4-P2W-AT1 Platinum 2-Wire Earpiece with full size PTT. Our PROFESSIONAL GRADE two wire surveillance kit is the top seller within the series. Already in use by hundreds of law enforcement officers, casinos, rental companies and night clubs. The Platinum Series 2-Wire is well proven in the field by heavy duty users. Get better quality of audio output and clarity with the Knowles high quality microphone. Equipped with a rugged kevlar reinforced cable, field replaceable transducers, heavy duty strain relief, and a THREE YEAR WARRANTY. Compatible with Harris XG-100, XG-100P, XL-185, XL-185P, XL-185Pi, XL-200, XL-200P, XL-200Pi, and PMLN6129A.