3865-300-1105 is an AEMC product, the Model 3865 Dual Voltage Recorder. It is a two-channel recorder designed to measure, record, and graph voltages up to 600V. It offers a high resolution LCD screen, an USB port for direct data downloading, and a real-time clock for accurate time/date stamping. The recorder also has support for both AC, DC and temperature measurements, dual universal input channels, and a low battery indicator. The 3865 is designed to help users track voltage changes over time, allowing for more accurate and reliable data.