An interrupt controller may receive a plurality of interrupts from a variety of sources. The system includes sub BMSs connected to each of the sub-packs a main BMS connected to each of the sub BMSs to collect the SOCs calculated in each of the sub BMSs and to transmit a final SOC to a vehicle SOC to a vehicle controller. The light module electrically couples with the data processing unit, which determines an intraocular pressure detection area according to the at least one light interference signal. Based on the identity, a communication channel between the visitor and the user may be established at the intercom unit.