20' collapsible buildings for living: 1:convenient installation 2:high ... 2 Ceiling lights ; 3 sockets(1 is A/C socket);(3)1 switch; ---other parts depend ... PVC down pipes in 4 corners10 Usageaccommodation,office,living room,hotel,meeting room, dormitory, shop, booth, toilet, storage, ... to place it . usage: you can use it for anything: living , shop , office , storage , bathroom , mobile toilet etc ...