The electric energy meter and the indoor display are connected by wired or wireless communication, and RS485, PLC (power line carrier), RF, WiFine, LoRa and other different types of communication methods will be used according to different application environments. STS split meter also plays a good role in preventing electricity tamper, the power bureau will use a highly sealed meter box to install the meter on an outdoor pole, the installation position is not easy for the public to reach and can not open the meter box; The act of preventing tamper without access to the meter cannot be implemented.