The CHU630 Customer Interface Unit (CIU) is designed for users of split prepaid electricity meters, serving as a vital link to query information and manage energy consumption. Featuring PLC/RF communication and a large LCD display, it allows users to input short codes for various inquiries, including consumption and remaining energy. With its low power consumption and tamper alarm functions, this CIU provides secure and convenient interaction, facilitating the development of smart home and AMI systems.