Features: 33 preprogrammed rules for count down bonus delay restricted move and a few period time. 11 Manual sets(customized options) All moves are counted for all operations Set different basic time and subsidiary parameter for both sides Standby button for close to display and save electricity Time and parameters can be corrected during a game Alarm can be set to remind running out of time Manual sets dtored in the system when you power off/on the clock. (If batteries have been taken out all manual sets will be reset) Power supply: DC3V 2pcs AA-size batteries Specifications: Material: Plastic Clock Type: Digital Package includes: 1 X Cheese clock.(Battery is not included)