SPLIT RECALLABLE MEMORY: 100 lap memory with 1/100th second precision. BACKLIGHT: Backlight design support the stopwatch to work in weak light or night. MULTI-FUNCTION: Stopwatch mode and stopwatch modes;Displays hour, minute, second, month, day and date with alarm feature. ALARM CLOCK & KEEP SILENT: it's to turn off the BEEP and alarm clock. POWER OFF: Turning off the stopwatch to extend battery life is available. 1. Professional stopwatch with backlight. 2. Alarm clock. 3. Extra digital screen with 3 rows display. 4. Hours, minutes, seconds, day of the week, month and day. 5. 45 minute countdown timer. 6. Wearable stopwatch. 7. Smart battery saving after no operations. 8. Silent mode with no alarm or BEEP at all. 9. to turn off. 10. Daily waterproof. colour:black Material:ABS size:Dial diameter: 50mm Thickness: 15mm Strap length: 27cm Package Contents: 1*Stopwatch with battery Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.