lost keys beep when close?

[Kiva]

I lost my keys and I'm pretty sure they are in my house, but I can't find them. since my car can know when I'm close to it with my keys, is there a product that could beep if I'm close to my keys?

like if I have this product could I walk around my house and beep when I get close to the lost keys?

 

[echarleswhyte]

there are gps trackers that you can use, however you need your key so you can attach the tracker. Otherwise it is a search until you find them. You do have a second key I hope.