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1, Model No: PS-630 Patent products  2, Display in three lines with large screen;3, 30 records. Each record can be saved and recalled. The precise time reaches 1/100second;Could display all time process with FS, SL and AV function;4, Countdown function;It can measure 9 hours 59minutes59seconds; 5, The frequency can be chosen with the range from 10times/minute to 320times/minute;6, Alarm clock and calendar function;7, Quakeproof, antimagnetic and waterproof function;8, Use 3v Lithium battery CR2032;9, Color is optional and could meet client's needs to do OEM.