Nano Timer, Overall Depth 1/2 in, Overall Diameter Not Applicable, Overall Height 2 in, Overall Width 2 1/2 in, Digital Display Screen Type LCD, Alarm Type Audible, Display Type Digital, Maximum Time Setting 23 hrs, 59 minutes, 59 seconds, Minimum Time Setting 1 sec, Count Direction Count Down, Count Up, Number of Channels 2, Clock Function Included Yes, Calibration Certificate Type Traceable, Includes Clip, Magnetic Back, Stand, Batteries Included Yes, Number of Batteries Required 1