WE Games Royal Crest Analog Chess Clock/Timer by Wood Expressions SUPER QUALITY QUARTZ CHESS CLOCK: This game timer features a Quartz clock that uses an electronic oscillator that is regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks are at least an order of magnitude more accurate than mechanical clocks. EASY TO USE: Lightweight and easy to carry! The clock has a very clear face with a brightly colored flag and second hand. The unit starts and stops easily with the push of a top button but both clocks can easily be froze by keeping the buttons in an even level. The clocks are easy to reset at the back and have a locking clip for each top button. AA battery included GREAT FOR BLITZ CHESS: Simply the best chess clock for speed chess. You can bang on it for decades and it just keeps working. CLASSIC ANALOG STYLING: Comes in a black plastic housing with a Royal Chess emblem on the face. Easy to read and nice looking, too! ECONOMICAL & DEPENDABLE: This is an economical tournament chess clock that stands the test of time and is often used by chess clubs, chess schools, and in the classroom. One study reported in the American Journal of Alzheimer&#039;s Disease and Other Dementias found that playing Bingo specifically provides Alzheimer patients with highly therapeutic mental stimulation. Patients who played the game did significantly better on measures of cognition, had increased alertness and awareness for hours after testing. Low tech board games like Shut the Box can be played alone or with friends or family and the benefits are significant.