Buy a chess clock for the exact timing systems you intend to use, then check how easily players can read and operate it. A long preset list is less useful than a clear way to enter the few controls your club or household actually plays.
| Timing feature | Meaning to verify |
|---|---|
| Basic countdown | Each player uses a fixed allocation. |
| Increment or bonus | A specified amount is added for each move under the chosen mode. |
| Delay | An allowance is provided per move without accumulating unused delay as extra main time. |
| Multiple periods | The clock changes time allocation under a specified transition rule. |
| Pause and correction | A clear way to stop and adjust the display when required. |
Increment and delay are different
As an illustrative budget, a five-second increment can add time after a quick move, while a five-second delay does not bank unused allowance. The display method can differ between clocks: a Bronstein-style implementation may show or restore time differently from a simple visible countdown. Read the manual’s exact procedure rather than choosing from a familiar label alone.
A verified clock example
DGT lists the DGT2010 with manual settings, bonus and Bronstein-delay options, multi-period modes, an optional buzzer, and two AA batteries. Its housing is listed at 195 × 105 × 60 mm and the display at 25 × 135 mm. Those specifications establish features and size, not a measured claim about readability for every player.
Match an event’s control exactly
Write down starting time, increment or delay, any move-count transition, and the later period. Compare that description with the manual before buying. Two clocks can both advertise multi-period play while implementing transitions differently. For organized play, use the organizer’s requirements and the applicable rules rather than assuming any digital timer will be accepted.
Inspect the human interaction
Check which side is running, whether each player can see the relevant time, and how the lever or buttons behave. A photograph does not establish button force or viewing comfort. If you can try the clock, practice starting, pausing, switching sides, and entering a correction before a timed game.
Plan for power and sound
Confirm the battery or charging requirements for the exact model and inspect the low-battery indication. Decide whether an audible signal is wanted in the setting. An optional buzzer can be useful, but its availability should not be confused with a guarantee that every tournament permits sound.
Keep a short setup reference
Record the actual mode and settings for your regular time control. Test a few move switches to confirm the behavior before play begins. That small preparation is more useful than relying on memory of a preset number from a different model or manual revision.
Sources and method
This is a researched decision guide. Product facts were checked against the primary sources below on November 2, 2026. Selection advice and worked examples are editorial reasoning. This guide does not include hands-on testing.
