This is a professional chess competition timer with 3 operation modes, designed for multiple game types including Chinese Chess, International Chess, and GO. It supports step counting, countdown, and count-up functions. The timer features easy operation with quick rule setup and one-button start. It includes a memory function for repeated use after initial configuration and has an adjustable alarm sound that can be turned on or off as needed. Features: - Multi-use with 3 operation modes suitable for various GO rules - Supports step counting, count-up, and countdown functions - Simple operation with quick rule setup and one-button start - Memory function allows repeated use after one-time setup - Built-in alarm sound with on/off option - Suitable for Chinese Chess, International Chess, and GO Specifications: - Name: Chess Competition Timer - Model: YS-902 - Material: ABS - Color: Black, Yellow (optional) - Battery: 2 x AA battery (not included) - Screen size: 103 x 23mm / 4.06 x 0.91in - Item size: 140 x 88 x 45mm / 5.51 x 3.46 x 1.77in - Item weight: 105g / 3.70oz - Package size: 150 x 100 x 50mm / 5.91 x 3.94 x 1.97in - Package weight: 157g / 5.54oz Packing List: 1 x Chess Clock