The choice of serious chess players, the Chronos line of digital chess clocks are renowned for their unmatched durability and reliability. Manufactured in the United States, each close is housed in a strong metal case and will withstand years of use. The Chronos GX is the newest addition to the Chronos family and features 4 preset blitz times, 8 preset tournament controls and supports both delay and increment modes, making it ideal for tournament players. Requires three AA batteries, which are included. The clock has dimensions of 6.5" (W) x 2.75" (L) x 2"(H)