The "Winkletronic" Easy Measuring Tool is an electronic device derived from the "Winklefix" Tool. Measures absolute, relative, and opposite angles quickly, precisely and reliably, and read off the large digital display. You can even take measurements in difficult positions, and hold function keeps a value on the display. Integrated horizontal and vertical spirit levels. An automatic "switch-off" feature turns the unit off after three minutes of non-use to extend the life of the battery. A light weight professional tool for glaziers and builders, especially for interior outfitting. Supplied with case.