DGT 1002 Digital Chess Clock with Bonus TimerDGT 1002 Digital Chess Clock with Bonus Timer DGT1002 is the simplest chess clock with bonus options available anywhere. Simply press + or to set the times and the game can begin! Easy to understand and fun to use! It operates on one battery (included) and comes with a 2 year warranty. A great little affordable chess clock with large display and clear digits perfect simplicity of design and operation. Use the DGT1002 with increments and never run out