Brother in law has a bunch of rental properties. Occasionally he inherits stuff when tenants leave under unusual circumstances. This drone was almost thrown out. It's a little abused but salvageable.
Well without having the controller and just a barebones P2 you will have to open it up to identify which P2 version you have. I posted two photos of both receiver module that were used in the P2 lineup. The 2.4GHz version has three IC's while the 5.8 GHz has only one IC but you cannot see that from the baatery compartment. As I have already mentioned those allen screws are metric and I do not know the exact size of the wrench.