Made of durable plastic for reliable use in practice and competition environments. Multi function timing modes BASIC, DELAY, BONUS, BYO YOMI to support different formats and training approaches. Clear large display and large, responsive buttons for easy reading and quick operation, providing a comfortable and precise pressing feel. Energy saving design helps conserve battery power for longer use between changes, improving uptime during extended sessions. Requires 2 x AAA batteries to operate (not included). Use scenarios: Chess club practice: switch between modes for quick, flexible timing during drills and blitz practice. Coaching sessions: use BONUS or DELAY to simulate real game conditions and analyze time management. Casual matches or school tournaments: reliable BASIC timing with straightforward operation and long lasting battery life.