We usually think of a doorbell as something that alerts people on the inside that there may be visitors wanting to enter on the outside. This GuitDoorbell makes a strumming sound when the door is actually opened, which alerts people on the inside that someone already entered. That makes this product’s name a bit of a misnomer, though we suspect that GuitDoorChime (or whatever) may have sounded stupid to the products creators. Whatever gripes we may have about the name, the product is kind of cool; set the guitar to play any chord, and each time anyone enters it’ll play it. We think it naturally belongs in a music store, sure, but we can picture this in any home without stretching our imagination too much. It’ll cost you $150, and comes in two colours.