Features 1、Using AG13 button battery, which has long service life 2、Large screen display, easy to read and convenient for using 3、60 set memory, 1/1000 second, which is practical and has high accuracy 4、There is fastest, slowest, average lap and time can be chose 5、Data can be read in memory even after being cleared. Specification Features: 1. Using AG13 button battery, which has long service life. 2. Large screen display, easy to read and convenient for using. 3. 60 set memory, 1/1000 second, which is practical and has high accuracy. 4. There is fastest, slowest, average lap and time can be chose. 5. Data can be read in memory even after being cleared. 6. Memory storage can roll back and forth when called out. 7. The metronome can reach a maximum of 320 beat and beeps per minute. 8. The timer can be used for up to 9 hours, 59 minutes and 59 seconds. 9. It can set calendar, week, clock, 12/24 hours and alarm clock. Specification: Item Type: Timer Condition: 100% Brand New Battery: Built-in 2 x AG13 Button Battery Optional Type: HS-360, HS-330, HS-320, HS-310 Package List: 1 x Timer 1 x Instruction