YS YS-902 Chess Timer Chess Clock for Go Tournament(Yellow English Version)1. Simple operation, with memory function, once set, repeated use 2. Quickly selected, set the rules, a key to start 3. Scope of application: chess, go, chess 4. Function: packet system add seconds system reading seconds system positive timing step counting 5. Power supply: 2 AAA battery power supply (not included) 6. Size: about 14 x 8. 8 x 4. 5cm 7. Weight: about 105g Specification: Package Weight One Package Weight 0. 30kgs 0. 67lb One Package Size