Digital chess clocks are now the most frequently used chess timers during professionnal tournaments. They feature the elctronic display system which allows to see the time left with accuracy to seconds. Lots of them have diversified time control options (bonus, delay). The choice is wide, everyone finds a clock to satisfy proper needs. There are clocks for electronic boards (can be used as sparing partners because of their chess engins mechanisms), clocks for Chess 360, and lots more. All clocks are made of plastic or wood.