I tested this and the phone will make and receive calls. This item will NOT come with a phone line/cable.  It is just the phone. See pictures for condition. Feel free to message any questions to me.

The product is a vintage AC Spark Plug Telephone from 1985. It is a unit type telephone manufactured in Taiwan. The brand of the telephone is Synanon. This unique collectible item is a one-of-a-kind piece that can add a retro touch to any space.