This frame is a road bike frame. Especially its dropout--simplehollowed-out design makes the frame look nice and light.If you are a road cycling enthusiast, then it is your a good choice for you.
As the name suggests a wall detector detects studs behind the surface of a wall. The more advanced scanners have multiple modes that detect studs, metal, live AC wiring, non-ferrous metal (such as copper pipe) and ferrous metal (such as rebar).