6 Timer Channels may be set independently but started simultaneously. This timer is unique in two respects; it is the only multi-channel timer on which various channels can be set independently but started simultaneously. Hourly chime beeps every hour. It also has the loudest alarm we have heard on a timer, strong enough to be heard above high levels of background noise. 4 channels count either up or down to 100 hours with 1-second resolution. A 5th channel works as a calendar and alarm clock. A 6th channel is a 10 hour stopwatch with 1/100 sec. resolution, lap & split functions. Has a built in stand for benchtop use, clips to a pocket, or sticks to any metal surface with a magnetic back. Powered by two button cell batteries included. Dimensions: 21⁄2 x 2 x 1⁄2 63.5 x 73 x 12.7 mmWeight: 2 oz 56.7 g *Certification Option N.I.S.T. traceable Certificate of Compliance available at additional cost Select option above. Downloads Instruction Manual Product Brochure Comparison Chart Comparison Chart