Feature: 1. CHESS CLOCKS: These chess clocks suitable for a variety of timing competitions. The basic time and auxiliary parameters can be changed at any time during the game. The left and right sides can be set separately for basic time and auxiliary parameters 2. TIMING OPTIONS: With the ability to switch between sound and silent mode, these chess clocks provide a helpful 10S countdown at the end of each game. Offering a total of 29 timing rules across 6 categories, each rule can be customized with different basic time and auxiliary parameters 3. DIGITAL DISPLAY: The clear and easy to read digital display ensures accurate timing during competitions, making it ideal for chess, Chinese chess, and Go tournaments. Suitable for chess players at home or in training institutions 4. RETRO STYLE: Combining precise with vintage beauty, these chess clocks pay tribute to a simpler era. Add a touch of retro aesthetics to your chess game setup with these old fashioned chess clock timers 5. PORTABLE AND CONVENIENT: Lightweight and easy to carry, these chess clocks are great for tournaments or casual matches. Keep your games running smoothly with the convenience and functionality of these chess clocks Specification: Item Type: Chess Clock Material: ABS Size: Approx. 19.5 x 12 x 5cm / 7.7 x 4.7 x 2in Battery Type: AA Battery x 2 (batteries not included). Package List: 1 x Chess Clock 1 x Instruction Manual