1. Includes 2 chips, black and white independent chips, chess clock more stable 2. 11.5x1.7cm LCD display, the size is relatively large, the number displayed is also clearer, the eyes do not easily fatigue 3. The circuit board uses automatic welding process, all parts are fixed on the panel, not easy to damage, the digital display will not be missing strokes, the keys will not malfunction 4. Material: plastic ABS resin shell + 2 chips + LCD + welded circuit board 5. Power supply: 1 AA batteries (not included) 6. Size: about 13.8 x 8.8 x 4.5cm 7. Weight: about 160g Functions: 1. Positive timer: up to 9 hours, 59 minutes and 59 seconds 2. Countdown timer: can be customized to set the time, can be set to 9 hours 59 minutes and 59 seconds or less 3. Reward function: can be customized to set each step reward time, each step reward time can be set to within 59 seconds 4. Delay function: you can customize the delay time of each step, the delay time of each step can be set to within 59 seconds 5. Alarm function: when a party loses, the alarm sound will last 3s 6. Memory function: turn off the power and then turn on the power (non-power off) to maintain the rule parameters used before shutdown 7. Prompt light: button cocking (prompt light on) side to start timing, display arrow pointing to go side 8. Battery capacity prompt: When the battery is almost used up, there will be a prompt symbol in the middle and top of the display 9. Step counting function: you can view and modify it (generally this function is used in regular chess tournaments)