After months and months of intense and rigorous research I have made a discovery. It is damn near impossible to get a key into a keyhole when sloshed into oblivion. It took a lot of work, but it is the truth—sorry, folks. This extremely cheap gadget—cheaper than what I would pay for a damn beer nowadays—will help solve that problem. This device will light up the keyhole when sound is sensed. Insert the key, walk into your bachelor pad and go to bed, alone, again. At least you won't have to sleep in the yard like I've been doing every weekend for the past couple months. The sound sensor keyhole finder will set you back $5, that's it!