Digital Chess Clock, YS-9901 or YS-902

Give each player a visible time display with a digital chess clock in the YS-9901 or YS-902 model.

✅ Track both players' time - Two displays show the timing information for the separate sides.

✅ Choose a supported time-control style - Both models list basic, bonus and delay settings.

✅ Add specialist modes with the matching model - The YS-9901 additionally lists byoyomi and count-up timing.

Choose the Timing Modes Before the Model

Identify the time control you want to use before selecting a clock, including whether byoyomi or count-up is required. Those extra functions are listed for the YS-9901 rather than both versions.

Configure the game settings before play and prepare the correct batteries for the selected model. The models have different battery formats and dimensions, so check those details alongside the mode list.

Technical details

• YS-9901: approximately 140 × 85 × 54 mm; two AA batteries.
• YS-902: approximately 140 × 88 × 45 mm; two AAA batteries.
• One selected timer; batteries excluded.

Choose the clock model with your required game-timing functions.