Digital Lab Timer, Features Display Indicator and Alarm for Each Channel, Overall Depth 1 3/8 in, Overall Diameter Not Applicable, Overall Height 3 in, Overall Width 3 in, Digital Display Screen Type LCD, Alarm Type Audible, Display Type Digital, Maximum Time Setting 9 hrs, 59 minutes, 59 seconds, Minimum Time Setting 1 sec, Count Direction Count Down, Number of Channels 3, Clock Function Included No, Calibration Certificate Type Traceable, Includes Traceable(R) Certification