The only timer manufactured with a continuously-adjustable alarm-volume control. Can be set from whisper low at the lab bench to ear-piercing loud for noisy plant areas. Alarms may be set to sound continuously until turned off manually or set to turn off automatically in 7 seconds or 1 minute. Three channels count down‚Äîeach with a memory (memory allows automatic return to the previously programmed time at the press of a button). One channel counts down, and when zero is reached, alarms and starts counting up. The stopwatch channel counts up and alarms at any preset time. The 2 repeat channels automatically alarm repeatedly at any programmed time interval (e.g., set it to continually sound an alarm every 37 min.). Clock channel displays time-of-day in AM/PM or 24-hour time. Each timing channel has a timing capacity of 99 hours, 59 minutes, 59 seconds. Extra-large, easy-to-read, headline-size, 1/2-inch-high LED digits are bright and sharp. Display can be read from 25 feet away. Housed in an ABS plastic case. Size is 6-1/2 x 4-1/4 x 3-1/2 inches and weight is 16 ounces. Unit operates on 115 VAC/60 Hz.