The handheld eFit scanner is the only 3D scanner in the world that captures the true geometry of the human ear which in turn produces the optimum custom in-ear device – from custom headphones, in-ear monitors for music performance, hearing protection, and even “hearables” capable of accurate health monitoring and fitness tracking. An in-ear custom device is a new product class which captures all the headphone benefits (fit, comfort, attenuation and fidelity).