It is Class 2, compact in size, and plugs in to a standard AC outlet. The DC output connects directly to the device it is powering with spade connectors. UL and CSA listed, designed for indoor use only. Mounting brackets are included for wall mounting. PRODUCT APPLICATIONS: The PS-18YC/A can be used for the following Aiphone Communication systems: • MK-1MD/A • MY-1CD • MYH-CU or MYH-CUB (1 PS-18YC/A per 2 monitors) • TB-M audio-only system SPECIFICATIONS: Input Voltage: Output Voltage