Precise timing for industrial and laboratory work. Accuracy of ±0.015% at maximum dial setting. Outer 6-1/2" dial has large numerals for elapsed time and inner circle of small numerals for use as a stop clock. Built-in buzzer with variable volume control. Rubber base pads. Two separate three-wire outlet receptacles allow automatic switching of external appliances. One outlet is controlled by a switch and can either make or break circuit at zero; the other is independent of the selector switch and always breaks circuit at zero.
Minimum setting of 1 second; total range of 60 minutes by minutes and seconds. 115V, 60Hz. UL and CSA listed.