3-in-1 chess clock with multiple timing modes including basic, rewards, delay and positive timing. This design supports different chess formats and training scenarios, helping players manage time effectively. User friendly interface. Large, easy-to-press buttons provide a responsive feel for precise timing during fast-paced games. Portable and durable. Made of ABS plastic, the clock is built to withstand regular use. Its compact size and rugged housing make it convenient to carry to tournaments and practice sessions. Energy efficient. An energy-saving mechanism helps extend battery life. Requires 2 AAA batteries for operation. Use scenarios - Standard play at tournaments or clubs: reliable time control with clear, straightforward operation. - Training and practice: simulate different time controls using delay and positive timing, or rewards timing to encourage quicker decisions. - Coaching and classroom use: portable tool for demonstrations and drills, easy to transport between lessons.