I am not sure either. It LOOKS like it MAY be a slider, but I agree with Clark. Either contact the listing agent or if you have an agent, set up an appointment to go see it. If you do NOT have an agent get one and have them show it to you. If I can be of further assistance please contact me.
I am not sure I am looking at the same picture your asking about but I do see something that looks like a Murphy bed in one room. It appears on the seventh picture. You might want to contact the listing agent for more information.