Size: 2.5x21.5 cm Bracelet design Color: Black LED Light Color: Red Material: Samurai sword carbonized steel folded 1000x over Length: approx 180 mm with 18 segments for wrist adjustment Clasp: Exclusive fold over lock design 2 Function Buttons (right-side): First for hour and date display + select， Second for mode change Settings: Time， Date， Year Power: 1 * Maxell CR2016 (pre-installed)