产品名称：ted pella计时器28171

Traceable^® Flashing LED & Big-Digit Dual Channel Timer

Unique visual flashing LED visual indicator. Allows simultaneous programming of two different timers from 1 second up to 99 hours, 59 minutes and 59 seconds. Resolution is 1 second; accuracy is 0.01%. Each channel has a distinct alarm and visual indicator when zero is reached. The alarm may be turned off or silenced automatically after 1 minute. The unique visual indication for each channel, when counting down, shows a green LED light flashing every second once the countdown time reaches 10 seconds. When zero has been reached, a red LED light flashes and the alarm is sounding. The alarm has three switch positions; high decibel for noisy areas, low decibel for quiet areas or off (muted) for silent visual flashing LED light operation only. Large 5/8” high LCD digits may be read from 20 feet.

NIST Traceable certificate with individual serial number is supplied with the timer. The timer comes complete with two AAA alkaline batteries, magnetic back, stand spring clip and an opening for a lanyard. Size is 3-1/2" x 3" x 5/8” (89 x 76 x 16mm); weight is 3 ounces (85 grams).