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 bonus increments and never run out of time! For more information please see the manual.