The product is a LEGO set number 75810 "Stranger Things The Upside Down", released in 2019 and retired. This set is part of the LEGO Stranger Things theme and features characters like Demogorgon, Will Byers, and Eleven. The set is incomplete and does not include all of the minifigures (Will is missing) or box & manual, but it is still a collectible item for fans of the TV show or Lego. Set appears to be complete beside the missing minifig, but please see pictures to assess the condition and completeness. Also, one of the upside down’s vines broke while I was preparing it for shipment (please see last picture). Will come partially disassembled. This LEGO set is a must-have for any fan of the popular series.

A digital version of the manual is available here: https://www.lego.com/en-us/service/building-instructions/75810