The EMC by Urwerk enables its wearer to control the watch's timekeeping performance, i.e. its amplitude, when on the wrist to suit their lifestyle. Such interactivity between watch and wearer is fundamental to this entirely mechanical watch which also incorporates electronic functions. The clearly legible dial shows hours and minutes, with small seconds at 1 o'clock and a power-reserve indicator at 7 o'clock. The subdial at 10 o'clock is the performance indicator, which displays variations in rate of +/-15 seconds a day, plus the amplitude of the balance. When a pusher is activated, the watch's electronic brain (Electro Mechanical Control EMC) - which stores energy produced by manual winding and uses optical sensors to measure oscillations – shows whether the movement is running fast or slow, and by how many seconds. A timing screw on the back enables the wearer to adjust the active length of the balance spring accordingly.