Lenovo ThinkPad T450s Laptop, Intel Core i5-5200U @ 2.20GHz, 4GB RAM, 500GB HDD, Windows 10 Pro. Laptop was well taken care of and is in like new used condition. Looks almost brand new! Laptop has been tested and is fully functioning and operating with no issues whatsoever. Please see all pictures. This laptop does NOT include an AC Power adapter; it requires the square tip charging adapter. Laptop is fully ready for use, just requires login & initial OS setup.